"Using Freezing Point Depression To Find Molecular Weight Formal Lab Report" Essays and Research Papers

Using Freezing Point Depression To Find Molecular Weight Formal Lab Report

Using Freezing-Point Depression to Find Molecular Weight Abstract: In this lab, the purpose was to use the freezing point depression method to determine the molecular weight of aspirin. This was done by determining the freezing of t-butanol and that of a t-butanol and aspirin solution; then finding the molality of the solution, and moles of aspirin. In the results of the experiment, the molar mass was found to be 192.2 g/mol, which differed from the established value of 180.2 g/mol by 6.7%...

Amount of substance, Boiling-point elevation, Chemical properties 637  Words | 3  Pages

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Determining Molecule Weight by Freezing Point Depression Method

2013 LECTERUR : EXPERIMENT 4 DETERMINING MOLECULE WEIGHT BY FREEZING POINT DEPRESSION METHOD STUDENT NAME : ID : LAB PARTNERS | | INTRODUCTION According to Anne, n.d, the freezing point of a liquid is decreased by adding to another compound to it. This is known as freezing point depression. The pure solvent will have higher freezing point than the solution. Colligative property of matter can explain more about freezing point depression. Whereas, colligative properties depends on the number...

Amount of substance, Freezing-point depression, Gas 975  Words | 4  Pages

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Molecular Weight by Freezing Point Depression

The melting point is the temperature at which the crystal structure of a solid breaks down with increasing entropy (+ΔS). Solute particles introduced into the solvent increases the entropy, and therefore decreases the temperature of the solution in order to reach the melting or freezing point of the solution. Hence the freezing point is depressed as solute is added. This depression is the difference (ΔTf) between the freezing point of the solvent and solute, and the freezing point of the pure solvent...

Chemistry, Concentration, Freezing-point depression 622  Words | 2  Pages

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Freezing Point Depression

M=22.880.29367 M=77.91gmol Based on the molar mass of calculated, the identity of the unknown substance D is Glycine. 2) Finding the concentration of a known solution Table 1.2: Table used for the preparation of the calibration curve used to find the concentration of alcohol in a wine. 0.2mL of each sample were taken and placed in the Osometer. Ethanol sample (g EtOH/100mL) | Osmolality (mOsm/kg H2O) | 5.117 | 109 | 7.984 | 181 | 11.13 | 242 | 14.01 | 307 | 18.31 | 404 | Wine...

Alcohol, Chemistry, Ethanol 1588  Words | 6  Pages

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Lab: Molar Mass by Freezing Point Depression

Lab Name: Molar Mass by Freezing Point Depression Researcher: Isabella Cuenco Lab Start Date: November 9, 2012 Lab Completion Date: November 9, 2012 Table of Contents SECTION NAME I. Introduction II. Procedure III. Data IV. Analysis V. Conclusion PAGE NUMBER   I. INTRODUCTION Purpose: The purpose of the lab is to find the molar mass of an unknown substance by measuring the freezing point depression of a solution of the unknown...

Freezing-point depression, Laboratory equipment, Liquid 908  Words | 4  Pages

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Molar Mass by Freezing Point Depression

Molar Mass by Freezing Point Depression November 28, 2012 NAME Lab partner- Purpose: To determine the molar mass of an unknown substance by measuring the freezing point depression of a solution of an unknown substance and BHT. Equipment: Test tube, 18*150 millimeters Wire stirrer Weighing dish Timer, seconds Chemicals: 2, 6-Di-tert-butyl-4-methylphenol, BHT, 16 grams Cetyl alcohol, CH3(CH2)14CH2OH, 1 gram Unknown substance...

Freezing, Freezing-point depression, Gram 657  Words | 3  Pages

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Determining Molecular Weight Using Solution Viscosity

Lab 2 Report for MATSE 473 Determining Molecular Weight using Solution Viscosity Name: Mengfang Li Group D Lab Partners: Michael Lorenzo, Peter Mcclure 01/24/2012 Introduction: This lab was designed to demonstrate the method to measure the intrinsic viscosity of the prepared polystyrene. Intrinsic viscosity, which is measured from the flow time of a solution through a simple glass capillary, has considerable historical importance for establishing the very existence of polymer molecules...

Chemistry, Concentration, Intrinsic viscosity 1278  Words | 6  Pages

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Physics Experiment: Analyzing Freezing Point Depression

Abstract: The students investigated about freezing point depression and at what temperature the substance changes states. The students used the freezing point depression to find the molar mass of benzoic acid. First they heated lauric acid to determine the temperature that the freezing point of the solvent is and then compared the temperature to that of the lauric acid/ benzoic acid solution. They then took the change in temperature in order to determine the molality of the benzoic acid, which was...

Absolute zero, Boiling point, Celsius 869  Words | 4  Pages

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Freezing Point Depression And Boiling Point

COLLIGATIVE PROPERTIES: FREEZING POINT DEPRESSION AND BOILING POINT ELEVATION DAY 1 – 04 FEBRUARY 2015 Colligative Properties Depends on the NUMBER of solute, not on the nature of solute particles Freezing Point Depression Boiling Point Elevation Vapor Pressure Lowering Osmotic Pressure Electrolyte and Nonelectrolytes Electrolytes •Separates in water forming a solution that conducts electric current •IONIC COMPOUNDS Non- electrolytes • does not allow the flow of an electric current • COVALENT...

Chemistry, Concentration, Freezing-point depression 491  Words | 24  Pages

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Olecular Weight Lab Report

General Chemistry I (FC, 09 - 10) Lab # 9: Molecular Weight of a Volatile Liquid 1 Revised 8/19/2009 ITRODUCTIO One of the important applications of the Ideal Gas Law is found in the experimental determination of the molecular weight of gases and vapors. In order to measure the molecular weight of a gas or vapor, we need simply to determine the mass of a given sample of the gas under known conditions of temperature and pressure. The gas obeys the Ideal Gas Law. PV = nRT...

Atmospheric pressure, Boiling, Density 1156  Words | 5  Pages

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Melting Points Lab Report

Melting Points Elizabeth McGrail Organic Chemistry I 25 January 2013 ABSTRACT The objectives of this lab are, as follows; to understand what occurs at the molecular level when a substance melts; to understand the primary purpose of melting point data; to demonstrate the technique for obtaining the melting point of an organic substance; and to explain the effect of impurities on the melting point of a substance. Through the experimentation of three substances, tetracosane, 1-tetradecanol and...

Chemical bond, Chemical compound, Chemical substance 1327  Words | 5  Pages

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Molecular Weight of Volatile Liquid Using Dumas Method

OBJECTIVE: * To determine the molecular weight of a volatile liquid by using Dumas method. METHOD: MATERIAL | CHEMICALS | 125 mL Erlenmeyer flask | Known liquid (2-propanol) | Rubber band | Unknown liquid | Boiling chips | | Watch glass | | 100 mL graduated cylinder | | Pin | | 600 mL beaker | | Hot plate | | Thermometer | | Room temperature water | | 6 × 6 and 8 × 8 aluminium foil | | PROCEDURE: SAFETY * Lab Coat and Safety Goggles. * Keep the bottles...

Atmospheric pressure, Boiling, Distillation 1013  Words | 4  Pages

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Determining the Freezing Point: Lab Experiment

Purpose: The purpose of this lab was to determine the freezing point of pure water, the experimental van’t Hoff factor for a substance and the molar mass of an unknown solution. Reagents: 25mL deionized Water ¼ to ½ inches of rock salt 25mL Sodium Nitrate (NaNO3 ) 25mL unknown solution – handle unknown solution carefully Procedure: For part 1, the freezing point of deionized water was determined. An ice bath was prepared by filling a 600mL beaker ¾ full of ice and covered with ¼ to...

Ammonia, Chemistry, Concentration 953  Words | 3  Pages

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Molecular Weight of a Condesable Vapor

AP Chemistry Period 1 Molecular Weight of a Condensable Vapor Lab Purpose: The purpose and objective of this lab was to find the molecular weight of a condensed vapor. Materials and Equipment: • Aluminum foil square (around 6cm on a side) • 125 mL flask • Barometer • 3 mL of unknown liquid • 200 mL graduated cylinder • 600 mL beaker • Pin • Balance (0.002g) • Bunsen Burner setup • Rubber band • Thermometer • Ceramic center wire gauze Procedure: 1. A 125 mL flask was obtained...

Boiling, Distillation, Evaporation 669  Words | 3  Pages

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Formal Lab Report. 10th Grade

School December 13, 2011 Formal Lab Report Introduction: This lab addresses how people’s metabolism directly affects their performance when faced with a situation that involves exercise for one, and two minutes. Using and understanding Cellular Respiration is something you will need to learn before you can fully grasp this Formal (Lee, Susan. Bio Home. N.p., 15 Feb. 2005. Web. 9 Dec. 2011. <http://biology.clc.uc.edu/courses/bio104/cellresp.htm>.) Lab Report. First of all, you will need...

Adenosine triphosphate, Carbon dioxide, Cardiology 1663  Words | 5  Pages

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Sample-Formal-Lab Report

TENS 2146 Electric Devices and Measurements Lab 3 Current and Voltage This report was prepared by: L. Wall Fall 2009 Prof. R. Alba-Flores Team Members: J. White, L. Wall Conducted on: September 17, 2009 Submitted on : September 24, 2009 Abstract: In this lab students experimented with light emitting diodes. The student built a basic circuit with two LED's and resistors in parallel. The results showed that the voltage is the same in parallel. The items that were in series had...

Electric current, Electrical impedance, Electrical resistance 1523  Words | 6  Pages

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Deicer Lab

three different experiments we were to find the quality of NaCl as a deicer. These experiments included testing the freezing point depression of NaCl in solution at two different concentrations, testing for the H of an aqueous NaCl solution, and combining NaCl with MgCl2 in an aqueous solution to test for freezing point depression. Through these various experiments we found NaCl to be the best deicer for our region due to its proficient freezing point depression and its cost efficiency. Introduction ...

Chemistry, Concentration, Freezing-point depression 1870  Words | 6  Pages

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Lab Report

Lab Report: Stoichiometry Lab Oct. 27, 2011 Claire Elizabeth Lab Partners: Hannah Signature:___________________ Introduction- Baking soda and vinegar are two common materials found in almost every household. That, plus the fact that all the starting and finishing materials are non hazardous and safe, is why this is one of the first chemical reactions that many people are exposed to The purpose of this experiment tests which of the two reactants (vinegar and baking soda) is the limited...

Acetic acid, Chemical reaction, Force 579  Words | 3  Pages

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Lab Report

Chem 105 Guide to the Formal Laboratory Report The purpose of a formal report is to communicate effectively to another person the goal, procedure, data analysis method, and results of your laboratory work. The report is divided into several well-defined sections. Each section must be present in a complete report. To earn an outcome point for the laboratory report, a student must submit a formal lab report that earns a score of at least 90/100. Each error (factual, grammatical, typographical...

Chemistry, Erlenmeyer flask, Error 1317  Words | 5  Pages

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Molar Mass by Freezing Point Depression Lab

Nick Boyea Billy Lee 3/9/11 Molar Mass by Freezing Point Depression Overview The purpose of this lab is to measure the freezing point depression of a solution of an unknown substance and BHT to determine the molar mass of the unknown substance. Summary of Lab Procedure If not already completed, crush a small amount of BHT and pack it into a capillary tube. Use a small rubber band to clamp the capillary tube to the thermometer, and fasten the thermometer to a ring stand. Fill a Thiele tube...

Freezing-point depression, Liquid, Melting point 602  Words | 2  Pages

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Project Report on Effect of Impurities on the Boiling Point and Freezing Point of A liquid

Project Report on “Effect of Impurities on the Boiling Point and Freezing Point of A liquid”   Declaration I, ____________ student of ___________________ is doing project report entitled “Effect of Impurities on the Boiling Point and Freezing Point of A liquid” being submitted to ___________________is an original piece of work done by me. (Signature) Project Report on Effect of Impurities on the Boiling Point and Freezing Point of A liquid   Introduction Project Report Boiling Point and Freezing...

Atmospheric pressure, Boiling point, Gas 1201  Words | 4  Pages

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Freezing point and melting point

 Title Freezing and Melting Point Objectives 1. To gain proficiency in constructing a graph and plotting data points. 2. To determine the freezing points of a compound from the graph of decreasing temperature versus time. 3. To determine the melting points of a known and unknown compound. Introduction Physical changes are the changes in the physical properties of a substance (Moore, Stanitski & Jurs, 2009). Freezing point is the fixed temperature at which a pure liquid converted into...

Chemistry, Gas, Intermolecular force 1331  Words | 7  Pages

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Dumas Method: Molecular Weight Determination

PHYSICAL CHEMISTRY LABORATORY REPORT (CHE 414L) Department of Chemical Engineering School of Engineering and Architecture Saint Louis University Group No. 12 Members: DEMOT, Judy Ann SOMERA, Randolf P. TIPAYNO, Samantha TORZAR, Precious Imee I. Signatures: ____________________ ____________________ ____________________ ____________________ Title: Determination of Molecular Weight of a Volatile Liquid By Vaporization: Dumas Method Background of the Study Problem In this experiment, an unknown liquid...

Amount of substance, Boltzmann constant, Gas 1931  Words | 6  Pages

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Molecular weight

ABSTRACT The effect of molecular weight and time on the rate of diffusion was resolved using the agar-water gel test. A petri dish containing three wells was used in the the agar-water gel set up. One drop of each of the three substances, potassium permanganate (KMnO4), potassium dichromate (K2Cr2O7) and methylene blue, was placed to each well at the same time. The potassium permanganate, having the smaller molecular weight of 158 g/mole, resulted the larger diameter (1.44mm) and the fastest...

Ammonia, Diffusion, Hydrochloric acid 1636  Words | 6  Pages

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Effects of Salt on Freezing Point of Water

4/9/02 Effects of Salts on the Freezing Point of Water In this experiment, you will study the effect that several solutes have on the Freezing Point of water. When a solute is dissolved in a liquid, the temperature at which that liquid freezes decreases, because the molecules of the solute become attached to the water molecules, making it more difficult for the water to form its crystaline shape and form into ice. This process is called Freezing Point Depression. In this experiment, you will...

Calcium chloride, Chemistry, Chlorides 833  Words | 3  Pages

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Formal Lab Report Graphing Anaylsis

Angelina Mass-Valderrama CHM1032 summer ‘12 Graphing and Estimating Formal Lab Report Introduction: Today scientists put acquired data into a form of a graph. This said graph is designed to help make predictions and furthermore, study and understand the experiment and its contents at hand. The Graphing and Estimating lab involves just that. The lab is designed to collect data from several tests involving burn time of a candle. Oxygen, O2, is a kind of gas. A lot of the air we breathe...

Analytic geometry, Candle, Curve 871  Words | 3  Pages

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Sample Lab Report

Physics Lab Report Format General Remarks: Writing a lab report is the only way your TA will know what you have done during the lab and how well you have understood the process and the results. Part of your lab experience should be learning how to organize and present your work in a scientific way. There is no framework that can be used as a “one size fits all”, therefore this sample lab report should only be used as an example. Any lab report should have the following features: ...

Linear equation, Linear regression, Measurement 914  Words | 4  Pages

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Recrystallization Lab Report

and Melting Points Organic Chemistry 2423 Lab Report: Recrystallization Abstract: The purpose of this lab was to purify an unknown compound by recrystallization. Taking an unknown compound and identifying it by purifying it from its impurities through the use of hot gravity filtration. Then to determine the unknown you were to take the melting point. An unknown compound was recrystallized from hot water to produce 0.99 grams (67% recovery). The pure unknown compound had a melting point of 127.0-128...

Boiling, Chemistry, Liquid 1030  Words | 4  Pages

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Lab Report

learning experiences of this lab is to learn the importance of calibrating a sensor. In most cases, a sensor will not have an output that is exactly what you need. An example of this is a strain gage. A stain gage gives back a voltage, but with that given voltage a distance can be found. Introduction: In this experiment, the QNET-MECHKIT was used. This board has multiple compact sensors that can be used for experiments. For this lab we will be using the strain gage to find the deflection of a bar...

Angle, Infrared, Measurement 713  Words | 4  Pages

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Lab report on a fischer esterfication

to form water and hexyl acetate, and to confirm the esterification with a nuclear magnetic resonance (NMR) spectroscopy. It was found that 0.3963 grams hexyl acetate was formed with a percent yield of 33.2%. The product was confirmed using NMR, IR, and boiling point confirmation. Backround: A Fischer Esterification is the formation of an ester and water from alcohol and an acid. More specifically it is a nucleophillic acyl substitution reaction carried out under acidic conditions. Carboxylic acids...

Acetic acid, Acid, Alcohol 848  Words | 5  Pages

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LAb Report: Striking It Rich

Lab Report Purpose: The purpose of this lab experiment was to learn about the different densities of different kinds of metal. We used pennies made out of different metals to determine this. After we gather the data, it'll be used to determine the metal used. Hypothesis: In the lab, I expect that the pennies before 1982 would be heavier than those that are after 1983 because the metal was initially changed because the earlier pennies cost more to make. So I think that since the heavier metal was...

2006 albums, Density, Difference 743  Words | 3  Pages

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Recrystallization lab report

2013 Lab Day/TA/Group: Wednesday(1:35pm)/Group A Labs reports must be typed and chemical structures must be drawn with ChemDraw. Report must not exceed three pages (including this page). Page limit does not include any attached spectra or references. ** Deductions for hand written report/structures and exceeding page limit ** Report Breakdown Data/Results: _________________ /10 Discussion: _________________ /10 Report Total: _________________ /20 Other Lab Marks ...

Boiling point, Celsius, Chemical substance 747  Words | 4  Pages

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Writing an Organic Chemistry Lab Report

Writing an Organic Chemistry Lab Report Components of a Laboratory Notebook The following components should be contained for each experiment, along with any additional material required by your instructor. • Title and date • Introduction (purpose, reaction) • Physical data (including calculations) • Procedure outline • Data and observations • Discussion of results (conclusions) Prelab Title and Date Give the title of the experiment and the date on which...

Chemical compound, Chemistry, Experiment 738  Words | 3  Pages

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Freezing Point of Naphthalene

Freezing Point of Naphthalene I. Purpose To determine the freezing point of a known substance, naphthalene II. Materials ringstand gas source test tube test tube clamps thermometer naphthalene Bunsen burner goggles hose stopwatch III. Procedure 1. Assemble the Bunsen burner, attaching one end of the hose to the burner and the other to a gas source. 2. Assemble the ring stand so that a ring clamp is attached to the stand holding the test...

Bunsen burner, Chart, Experiment 612  Words | 4  Pages

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Molecular Gastronomy

Molecular gastronomy is a subdiscipline of food science that seeks to investigate, explain and make practical use of the physical and chemical transformations of ingredients that occur while cooking, as well as the social, artistic and technical components of culinary and gastronomic phenomena in general.[4] Molecular gastronomy is a modern style of cooking, which is practiced by both scientists and food professionals in many professional kitchens and labs and takes advantage of many technical innovations...

Cooking, Culinary art, Flavor 1495  Words | 5  Pages

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lab and ph

 pH and Chromatography Lab Report Kevin Rivera Biology Mr. Langley 2C 10/7/13 Introduction In this lab, of pH and Chromatography, in the pH aspect of the lab we are trying to figure out the pH level of certain chemicals by writing down of known solutions to find the type of unkown solution using pH standards. In the Chromatography, we are trying to separate the chemicals using water and a piece of paper. Methodology Materials: Safety Goggles pH indicator...

Acid, Base, Chemical substance 543  Words | 4  Pages

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Bio Lab Report

How to Write a Lab Report Lab reports are formal papers that describe and analyze lab experiments. They follow a very specific format. If you study this paper carefully and follow its directions, you will find that these papers are not at all difficult and can have a positive impact on your Biology grade. Paper formatting: The paper should be typed and double spaced. Use a standard 12 point font (do not use cute fonts or colored paper!). Except for the title and abstract – each section...

Bibliography, Citation, Experiment 1329  Words | 4  Pages

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lab report

Erin Arroyo  Lab report June 11, 2013 Biology 123 Professor K Title: Scientific Investigation of the Peroxidase Enzyme & Temperature Abstract:  In this lab we tested the effect temperature has on the rate of enzyme activity. The way we figured this out was by taking four different temperatures and testing the different absorbance levels they produced every 20 seconds for two minutes straight using a spectrophotometer. The important part of this experiment was the temperature...

Catalysis, Chemical reaction, Chemistry 1725  Words | 8  Pages

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Lab Report Analysis

6 November 2012 SUBJECT: Lab Report Analysis This memo proposes the observations and claims I collected from reviewing three different lab reports. Three fields of study are composed within this memo that includes Electrical Engineering, Environmental Engineering, and Petroleum Engineering. “Electrical Filters,” (Electrical), written by Joe Schmoe, is a lab report made by a student at a university. The College Board produced an environmental lab report named, “Monitoring Air Quality,”...

Air pollution, Clean Air Act, Documents 1497  Words | 5  Pages

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Lab Report

Chemistry Lab Report Water Hydration Introduction: A hydrated crystal or hydrated occurs when water becomes tightly attracted to a metal salt base on it’s polarity. The water molecules maintain integrity as molecules, however they are considered to be part of the formula of the hydrate. When the hydrate metal salt crystal is heated, the attractions to the water are broken by the heat energy and the water escape from the crystal. After heating the salt crystal is called as anhydrous, which...

Evaporation, Heat, Hydrate 1100  Words | 5  Pages

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Formal report

 Acid/Base Titration Formal Report Emily Moore July 9, 2013 C126 Section 4543 TA: Renae Nelson Introduction: Acids and bases react together to form a process called neutralization. Acids will increase the hydrogen ion concentration and bases will increase the hydroxide ion concentration in a solution. When an acid and a base come together, the hydrogen and hydroxide come together to form water, and the other components of the acid...

Base, Chemistry, Equivalence point 1256  Words | 5  Pages

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Lab Report Template

Formal Lab Report Template Title Page Number of the experiment Title of the experiment Names of lab partners Date(s) on which the experiment was conducted Abstract = What are the main points of the entire report? Purpose or objective Key results Major points of discussion Main conclusion(s) Introduction = What is the background and purpose of the experiment? Purpose or objective One or two sentences, including the main method(s) used to accomplish the purpose. Background...

Error, Experiment, Hypothesis 271  Words | 3  Pages

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Catalase Formal Lab Report

Ellen Grant Honors Bio I Organic Compounds Problems and Objectives: The purpose of this lab was to select the suitable test for an organic molecule and define the safe process for that test. An organic molecule is normally found in or produced by living systems. (Unknown Author, 2014, www.biology-online.org/organic_molecule)In this lab one was supposed to infer the results of the test and be able to identify if major biomolecules are present. You were to analyze a variety of tests including...

Carbohydrate, DNA, Ethanol 1366  Words | 4  Pages

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Freezing Point Depression Determination SCIENCE LAB EXPERIMENT

This paper is a full determination for certain chemicals and their boiling points. It lists some already but given the atomic numbers of any material this project includes a conversion and calculation chart to find the freezing point of most any material. GOOD LUCK! Abstract: In this lab we determined the freezing point, and Kf, of pure 2,4,dichloralbenzne as well as a 2,4,dichloralbenzne/biphenyl solution. We used this information to determine the molar mass of an unknown (#24) by the 3rd step...

Differential scanning calorimetry, Freezing, Freezing-point depression 2033  Words | 14  Pages

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Formal Lab Report on Enzymes

Lab #5-Enzymes NAME DATE LAB PERIOD Introduction Enzymes are proteins, though highly complex and diverse, they serve one basic function; to work as an organic catalyst. A catalyst, as defined by Merriam-Webster dictionary, is a substance that enables a chemical reaction to proceed at a usually faster rate ("Catalyst-Definition and more."). They function by reducing the activation energy, or energy required to start a reaction. The way enzymatic reaction works cannot be altered, but the...

Catalysis, Chemical reaction, Enzyme 1105  Words | 4  Pages

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Chem Lab Report

A. Goal and Purpose: Session 1: In this lab, we will achieve a simple Friedel-Crafts alkylation of anthracene. The choice of anthracene as an aromatic substrate stems from two considerations. First, there is a question of regioselectivity. Second, anthracene and its derivatives are highly visible under UV light. Session 2: In this lab, we will complete a partial conversion of 9-acetylanthracene using m-chloroperoxybenzoic acid (mCPBA). We will also determine by NMR, the regiochemistry of the...

Chemical reaction, Chemistry, Chlorine 1746  Words | 7  Pages

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Empirical Formula Lab Report

 FORMAL LAB REPORT INTRODUCTION John Dalton’s atomic theory states that elements combine in simple numerical ratios to form compounds. A compound, no matter how it is formed, always contains the same elements in the same proportion by weight. The law of mass conservation states that mass can neither be created nor destroyed. In this experiment, the mass of the metal was not destroyed or created; the metal’s mass was simply changed into a compound form once...

Chemical element, Magnesium, Magnesium nitride 1059  Words | 5  Pages

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Lab report

09/17/13 Che 102L Lab # 4 Molar Mass by Freezing Point in Anti-Freeze. Objective: to determine the freezing point of pure naphthalene, determine the molar mass of an unknown by measuring the freezing point depression of a solution of the unknown in naphthalene. Materials: Beakers 600 mL, 2-250 mL,Crystal Ice,20 g of NaCl,Stirring Rod,Thermometer,Foil, Water, 10 mL, Cylinder, 25 mL 100 mL Dropper, 2 Test Tubes. Procedure: Filled 600 mL beaker with ice, took temperature until it got...

Chemistry, Concentration, Freezing 384  Words | 3  Pages

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Banana Oil Lab Report

 Banana Oil Lab Report Jesse Bradford 7/10/14 MTWR Section Introduction In the banana oil lab we began with isopentyl alcohol + acetic acid  isopentyl acetate + Water. We needed for this experiment a hot plate, clamps, pipette, 5mL vial, caps, hoses and a thermometer. Upon starting, our group set up an open system experiment that allowed gases to be released to avoid pressure build up. We mixed together to molecules, 1.0mL of isopentyl alcohol, 1.5mL of...

Acetic acid, Carbon dioxide, Carboxylic acid 924  Words | 5  Pages

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Yeast Lab Report

Yeast Lab Report Guidelines 1. Lab reports are to be computer-generated and double-spaced. All sections of the report must be written in paragraph form. 2. Do not use encyclopedias (Internet or otherwise), dictionaries ((Internet or otherwise), or personal web pages as sources for the report, this includes Wikipedia. You may use a textbook, lab manual, and/or article(s) in a published journal. You can find journal articles by going to the library website: http://www.lib.clemson.edu/ and selecting...

Basal metabolic rate, Citation, Experiment 1408  Words | 4  Pages

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Formal Lab Report 2 Final

and thereafter harmless substances water and oxygen. The goal of this lab is to measure the reaction rate of this process in different substances such as a liver, a vegetable, and breast tissue. By using variables such a pH and temperature we are able to how the rate of reaction is altered or improved. If it has improved, the optimum has been discovered and the enzyme will create a higher reaction rate. If above the optimal points, proteins will denature and the reaction rate will remain the same....

Catalase, Catalysis, Chemical reaction 1572  Words | 7  Pages

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Exploring Boilng Points Lab

Exploring Boiling Points Introduction: Every substance has a unique set of properties that allow us to differentiate between them. These properties are classified as physical properties and chemical properties. Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness. Chemical properties tell us how the substance...

Alkane, Boiling point, Gas 1422  Words | 5  Pages

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Ionic Reaction Lab Report

                                         Lab Techniques & Measurements Pre Lab Questions: (4pts) 1.      What will you learn after completing the lab? -The experiment will introduce different level of precision and measuring to the appropriate decimal place and will be familiar with measurements and weight. 2. Write the symbols and equation used to make a dilute solution from concentrated or stock solution. - The concentration of substance is described as molarity and...

Absolute zero, Boiling point, Celsius 877  Words | 6  Pages

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Guidelines for Lab Report

Engineering Laboratory (Lab) Report Department of Engineering Faculty of Engineering and Science, University Tunku Abdul Rahman (UTAR) 1. Introduction Laboratory (Lab) reports are the most frequent document written by engineering student. These reports can contribute a significant amount of marks and yet little time or attention is devoted in understanding on how to write them well. The aim of this document is to provide a general guideline on writing a lab report. A lab report should not be...

Experiment, Grammatical tense, Laboratory 913  Words | 5  Pages

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Pure Water Graph

Peter Jeschofnig, Ph.D. Version 42-0149-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate student’s writing of lab reports by providing this information in an editable file...

Amount of substance, Boiling point, Distillation 1096  Words | 5  Pages

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Molecular Modeling

Molecular Modeling Exercise The purpose of the is lab was to practice modeling molecules and exploring the capabilities of the ChemOffice programs. The minimum energy was found for each of the three molecules tested and the strain energy at different dihedral angles was plotted. The first molecule, butane, was easily completed but amphetamine and U4EA caused some difficulty. The results of the last two were not very conclusive. INTRODUCTION The purpose of this lab was to explore the capabilities...

Angle, Atom, Chemical bond 695  Words | 3  Pages

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Specific Heat Lab

Specific Heat Lab Objective: Find the specific heat of the unknown metal given using calorimetry. Background Theory: In every reaction, energy is transferred between a system and its environment. A system encompasses the substances that are involved in a reaction, and everything else in the universe other than the system is called the environment. The standard SI unit of energy is Joules (J). Temperature is the level of excitement of the atoms in a substance. In most cases, energy is...

Absolute zero, Energy, Heat 731  Words | 3  Pages

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Lab Report

MEC 325/580 Lab Report CNC Machining Lab Report Date: March 18, 2013 Group Leader: Jian Wu Team Members: Group Number: G4 Regment No.: D Insturctor: CONTENTS 1.Objective and introduction. 2.Principles and practice. 3.Design and result. 4.Conclusion and recommendations. Appendices 1. Objective and introduction * Objectives Operate the CNC milling machine using G-codes, M-codes in a CNC program. * Equipment: Minitech CNC machine (Series 2) * Machine...

Electrical discharge machining, G-code, Machine tool 1099  Words | 4  Pages

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Lab Reports

Sample Short Lab Report By Charles M Borener Jr April 24, 2009 Kinetic Friction Experiment #13 Joe Solution E00123456 Partner - Jane Answers PHY 221 Lab Instructor – Chuck Borener Thursday, 11 AM – 1 PM Lecture Instructor – Dr. Jacobs Abstract In this experiment, we test factors which effect friction. We pulled a wood block across a surface to determine whether the surface area of the block or the type of surface effects friction. We found that the surface area of the block did not change...

Classical mechanics, Force, Friction 936  Words | 3  Pages

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Physics Lab Report

Physics Lab Report 1. For the wavelength measurement of different colors in the Hydrogen spectrum done in the lab, tabulate your data recorded along with the wavelength calculations performed for all colors in the spectrum. (2 points) Line Color a_left (m) a_right (m) a_average (m) sinq nm Red 0.235 0.27 0.2525 0.182145 5.47E-09 Green-Blue 0.17 0.33 0.25 0.180505 5.42E-09 Indigo 0.16 0.35 0.255 0.18378 5.52E-09 Violet? 0 0 0 0 0 To find the wavelength for all of the colors in this lab we used two...

Color, Electromagnetic radiation, Emission spectroscopy 349  Words | 2  Pages

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