Melting point Essays & Research Papers

Best Melting point Essays

  • Melting Point - 1537 Words
    Melting Point Determination Identity and Purity of Solid Organic Compounds Objectives • To introduce the technique of melting point determination. • To use the concept of melting points for identification and characterization of organic compounds. • Properly fill and use a capillary melting point tube. • Determine accurate melting point ranges for a wide variety of organic substances. Introduction The melting point of a solid can easily and accurately be...
    1,537 Words | 7 Pages
  • Melting Point - 755 Words
    * Introduction The melting point is defined as the temperature at which the solid is in equilibrium with its liquid, and this characteristic is very unique, so a substance can be determined by the melting point. Determination of the melting point is very important technique in many areas of chemistry especially, in organic chemistry area because the melting point is really significant in order to identify the purity and the identity of a substance. Measuring the melting point is a fast and...
    755 Words | 3 Pages
  • Melting Point - 930 Words
    Mixture Melting Points Abstraction Determining the melting point is very significant in order to identify an unknown. In this experiment, measuring the melting point was done by using melting point apparatus. The melting point of the unknown sample #10 was 111.5˚C. There were two possible compounds which were dibenzoyl ethylene and o-Toluic acid because their melting points were 111.2˚C and 109.8˚C when each compound was mixed with the unknown. Therefore, the unknown #10 was dibenzoyl...
    930 Words | 3 Pages
  • Melting Point - 633 Words
    Melting Ice * Salt is routinely used to make icy roads and sidewalks safe in the winter. As soon as the salt comes in contact with the ice, the surface of the ice starts to melt. This only works, however, if the temperature outside is at or near freezing. If it is too cold outside, the ice itself becomes very dry and salt is not as effective in melting it. Salt Reduces Freezing Temperature of Water * Salt works by lowering the freezing temperature of water. Salt water needs to reach a...
    633 Words | 2 Pages
  • All Melting point Essays

  • Melting Point - 316 Words
    Melting Point Determination Lab Materials: Graduated pipette Capillary tube Tin wipe Sample Melting temperature apparatus Thermometer Procedure: Take open end of capillary tube and tap it gently into sample. Take tin wipe and place over the opening. Gently tab it so the sample will funnel to the bottom of the tube. You may also use a graduated pipette to accomplish this. Now, place the capillary tube in the designated spot in the melting apparatus, and once placed, turn the...
    316 Words | 2 Pages
  • Melting Point - 1566 Words
    Abstract Finding the melting point of an organic substance is a practical and efficient way for scientists to identify an unknown substance or determine a known substance's level of purity. When organic substances are mixed together in varying degrees they take on a melting characteristic that is lower and broader than in its pure form. This property was manipulated in the lab to observe the various melting points of Naphthalene and Biphenyl when the percentage of composition was altered....
    1,566 Words | 6 Pages
  • 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...
    1,331 Words | 7 Pages
  • Melting Point and Solid Acetaminophen
    Acetaminophen Abstract: The aim of this experiment is to prepare Acetaminophen (p-acetamidophenol), an amide. Acetaminophen will be created by treating an amine (p-aminophenol) with an acetic anhydride. Color impurities present in the solid acetaminophen will be removed and then the decolorized product will be collected on a Büchner funnel for further purification by crystallization. Purity will then be determined by melting point. Introduction: Acetaminophen is commonly used as an analgesic...
    539 Words | 2 Pages
  • Melting Point Determination - 742 Words
    Introduction Recrystallization is a method used to purify solid organic compounds. Using the recrystallization technique, a solid compound is dissolved in a solvent and the compound slowly crystallizes as the solution cools. Using a filtration technique, a pure solid is produced when the molecules of the impure particles in the compound are excluded from the crystal lattice. After obtaining the pure compound, a melting point determination procedure can be done using a mel-temp device to...
    742 Words | 3 Pages
  • Melting Point and Boiling Point of Compounds
    Mapua Institute of Technology School of Chemical Engineering and Chemistry Muralla St., Intramuros, Manila Melting Point and Boiling Point of Organic Compounds Group No. 5 Manacup, Cris Vincent L. Oblena, Adrian D. Ong, Joshua Jyro B.* *Leader ABSTRACT In compounds, two of the physical properties affected by the varying structures are melting point and boiling point. Through the use of the Thomas-Hoover Melting Point Apparatus or the micro method, the melting and boiling point...
    1,973 Words | 9 Pages
  • Melting Point Lab - 653 Words
    Melting Point Determination and Thermometer Calibration Lab Background: The melting point of a substance, a solid in this case, signifies the temperature at which the first crystal starts to melt until the temperature at which the last crystal disappears is reached. That being said, melting points are expressed in ranges, am organic compound will have a sharp range depending on the purity of the compound. Impurity of an organic substance will register an abnormal melting point based on its...
    653 Words | 3 Pages
  • Melting Point Determination - 1858 Words
    | |Formal Report 1 | | | |Experiment Number 3 | | | |Chem201L | | Determination of...
    1,858 Words | 7 Pages
  • Solids: Recrystallization and Melting Points
    Solids: Recrystallization and Melting Points Reference: Chapter 3. Solids: Recrystallization and Melting Points. Read pages 93-94 and 113-117. Experimental procedure, pages 118-119. Parts 1-3. Part 1: Melting points of Urea and Cinnamic Acid. Part 2: Melting point of unknown. Part 3: Melting point of Mixture- Urea and Cinnamic Acid (take melting points of mixtures in 1:4, 1:1 and 4:1 ratios). Reactions Main Reaction: Not a chemical reaction but a physical reaction. Urea in solid mixed...
    1,441 Words | 5 Pages
  • Melting Point Lab OC
    Objective: The objective of the Melting Point Lab was to learn the technique of melting point determination. Also, to discover the identity of an unknown compound from using the mixed melting point method. Introduction: The range of temperatures between the temperature at which the first crystal just stats to melt and the temperature at which the last crystal disappears is known as a melting point. There are two many reasons that melting points provided us. The first purpose is to...
    848 Words | 3 Pages
  • Lab2 Recrystallization And Melting Point
    CHEM-2461-14 Experiment 1: Recrystallization and Melting Point Measurement: Identifying a component of panacetin. I have submitted a copy of this report on Canvas. ______________________________________ Signature Date Introduction The goal of the following experiment was to identify whether an unknown component of panacetin was acetanilide or phenacetin through recrystallization, the dissolution of an impure substance in a boiling solvent, and the examination of melting points from...
    1,517 Words | 5 Pages
  • Mixed Melting Points - 843 Words
    Organic chemistry 201 | Mixed Melting Points | Determination of an Unknown Solid | | [Type the author name] | 9/15/2011 | Purpose : The main purpose of this experiment was to identify an unknown compound/substance by performing multiple experimental melting point tests. Pure and impure solids were tested to see what affect pureness/impureness had on a melting point. Background: The melting point of a solid can be used to determine the purity of the solid. Pure samples usually...
    843 Words | 3 Pages
  • Melting Point and Boiling Point of Organic Compounds
    Social Alchemy 2nd Quarter / SY 2012 – 2013 Eng’r. Josephine A. Ng CHM142L/B21 Concepcion, Jermin B. Group# 2 Experiment No. 1 ------------------------------------------------- MELTING POINT AND BOILING POINT OF ORGANIC COMPOUNDS ------------------------------------------------- ABSTRACT The melting point (MP) and the boiling point (BP) are probably the most widely used physical constant in the field of science. Determining the boiling point and the melting point of a compound...
    2,649 Words | 12 Pages
  • Melting Point and Boiling Point of Organic Compounds
    Melting Point and Boiling Point of Organic Compounds Bongo, Sayre, J1 1Student, Organic Chemistry 1 Laboratory / B11, School of Chemical Engineering, Chemistry and Biotechnology, Mapúa Institute of Technology ABSTRACT The melting point of a substance is the temperature at which the material changes from a solid to a liquid state while the boiling point is the temperature at which it changes from liquid to solid. In this experiment, the main objectives were to determine the effects...
    3,227 Words | 10 Pages
  • [Pharmaceutical Chemistry] Melting Point and Boiling Point Determination
    The Melting Point and Boiling Point determination of Malic Acid and Ethyl Acetate By: Sabrina Grace T. Aguinaldo, Jan Dominik C. Arceo, Faerie Carleen Lucile L. Almira Department of Pharmaceutical Chemistry, College of Pharmacy University of the Philippines Manila The Health Sciences Center Valenzuela Hall, Taft Avenue, corner Pedro Gil St. Ermita, Manila Philippines Keywords: Melting Point: temperature at which a solid changes state from solid to liquid at atmospheric pressure....
    2,798 Words | 11 Pages
  • Identification of an Unknown Solid by Melting Point
    ¥°. Summary of Results A. Melting point of Benzoic Acid Temperature (¡ÆC) Observation Unmelted White salt First liquid appear point 122 Grainy and shiny white Becoming all liquid 125 Clear B. Melting point of unknown #42 1st trial Temperature (¡ÆC) Observation Unmelted Shiny light yellow crystal First liquid appear point 99 Grainy yellow Becoming all liquid 101 Clear 2nd trial Temperature (¡ÆC) Observation Unmelted Shiny light yellow crystal First liquid appear point 95...
    521 Words | 2 Pages
  • Experiment 1: Mixed Melting Points
    ABSTRACT Determining the melting point of a solid organic compound is the easiest way to identify the compound and determine its purity at the same time. For actual samples of compounds, the melting will occur over a range of temperatures making the melting points into a melting “range”. The difference between the temperature at which the sample begins to melt and the temperature at which it finishes melting, or the magnitude of the melting range, is a very important criteria of determining...
    410 Words | 2 Pages
  • Purity and Purifications of Solids Using Melting Points.
    Purity and purifications of solids using melting points. Tatyana Aleksandrova CHE 337, Section 001 Department of Chemistry Portland State University, Portland, OR                                                                     Abstract Melting points of Naphthalene/Biphenyl mixtures differing in their percent compositions were observed and plotted on a graph that indicated eutectic point of the mixture to be at 50 mole percent Naphthalene. Using...
    1,088 Words | 6 Pages
  • The Purity and Purification of Solids Melting Point Lab
    The Purity and Purification of Solids Melting Point Lab Introduction: The point of this lab was to determine the eutectic point for the naphthalene biphenyl mixture, as well as determining the melting point of an unknown substance by comparing it with two known samples. Melting point is a temperature in which a substance changes from solid state to liquid state. Melting points are used to determine whether the given substance is pure or not. Substances that melt sharply, less than 1-2°C...
    1,571 Words | 7 Pages
  • Melting Ice - 948 Words
    Research report Water is very important .We need water to drink, to wash our hands, to cook, to water plants and many other things. Without water, the plants would die and people and animals would go thirsty. What is water? Water is made up of two hydrogen atoms, and one oxygen atom. When these atoms come together, they form a strong bond that can’t be broken. What is Table salt? Sodium chloride Designed for cooking Has many ingredients 1. Potassium iodine- stabilizer...
    948 Words | 3 Pages
  • 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 •...
    491 Words | 7 Pages
  • Freezing Melting Lab - 838 Words
    Freezing and Melting of Water. 10/24 Richard Landolfi Due Date:11/1 Purpose the purpose of this lab is to determine the freezing and melting temperature of water. Freezing temperature, the temperature at which a substance turns from a liquid to a solid, and melting temperature, the temperature at which a substance turns from a solid to a liquid. Hypothesis If the water is at a low temperature then it will...
    838 Words | 4 Pages
  • Melting Pointe Determination - 557 Words
    Melting pointe determination #01 Introduction: Objective To learn how to obtain an accurate melting point using a MELTING POINT APPARATUS, then use them to draw eutectic curve and determine the eutectic point. Melting point of a solid is the temperature at which the solid and its liquid form are in equilibrium, i.e., molecules move back and forth between the two states at the same rate, so both phases remain present. If the temperature of a solid is measured carefully as the solid is...
    557 Words | 3 Pages
  • Melting Range Report - 305 Words
    Melting Range Report Name: Date: Lab Section: Selected Known Compounds Name Structural Formula Literature Melting Point Acetanilide C8H9NO 114.3°C Fluorene C13H10 116.5°C Experimental Data Sample Composition 1. 100% Acetanilide 2. 10% Acetanilide 3. 25% Acetanilide 4. 50% Acetanilide Fluorene 5. 75% Acetanilide 6. 90% Acetanilide 7. 100% Fluorene Melting Range 108-116°C 108-112°C 105-112°C 102-109°C 105-112°C 109-115°C...
    305 Words | 3 Pages
  • Osmoregulation as a Homeostatic Mechanism using the Comparitive Melting-Point Method for two Crab Species.
    Osmoregulation as a Homeostatic Mechanism using the Comparitive Melting-Point Method for two Crab Species. Abstract Two crab species, Plagusia and Cyclograpsus, were collected from a local estuary in the littoral and deep water zone for osmoregulation studies. To examine differences in osmoregulatory mechanisms among the species, haemolymph of the specimens was extracted once they were acclimated to varying concentrations of seawater. Using the comparative melting-point, capillary tubes...
    1,819 Words | 5 Pages
  • Freezing Point Depression - 1588 Words
    Calculations For this experiment, the osmolality given by the machine was equal to the molality. 1) Finding the identity of a unknown substance Molar Mass of Possible unknown substances (g/mol): * Glycine: 75.067 * Glucose: 180.155 * Mannitol: 182.171 * Sucrose: 342.26 * Lactose: 360.312 Results: Table 1.1: Table showing the results for the osmolality. 200mg of the unknown was dissolved with 10mL of doubly deionized water. A 0.2mL sample was taken and placed in the...
    1,588 Words | 6 Pages
  • Freezing Point Deperession - 532 Words
    Ben Quinones AP Chem Mr. Perry 25 January 2013 Molar Mass by Freezing Point Depression Conclusion: My Lab unsuccessfully found the molar mass of the unknown given to us in the lab. We were tasked with finding the molar mass of an unknown compound using the colligative property of Freezing Point Depression. The way we did this was first finding the temperature at which ice crystals form for just regular BHT. Luckily thanks to our TA we were given temperature probes so we could pinpoint...
    532 Words | 2 Pages
  • Molecular Weight by Freezing Point Depression
    Introduction 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...
    622 Words | 2 Pages
  • 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...
    657 Words | 3 Pages
  • 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...
    908 Words | 4 Pages
  • 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...
    2,033 Words | 14 Pages
  • Colligative Properties Freezing Point Depression And Molar Mass
     Experiment 3 Colligative Properties Freezing-Point Depression and Molar Mass By, Andrew Klingsporn Joby J. Chem 212 Dr. Chandana Meegoda 2/11/2009 Purpose The purpose of this experiment is to determine the Molar Mass of an unknown substance using its freezing point depression. Introduction There are two types of mixtures; homogenous and heterogeneous. Homogenous mixtures have components that are uniformly mixed, while heterogeneous mixtures do not. A solution is a...
    1,247 Words | 9 Pages
  • 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...
    602 Words | 2 Pages
  • Determining Molecule Weight by Freezing Point Depression Method
    BASIC CHEMISTRY (UDBB 1114) BACHELOR OF SCIENCE (BIOTECHNOLOGY) SESSION : MAY 2013 DATE : 25 JUNE 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...
    975 Words | 4 Pages
  • Heat of Fusion for Ice - 1071 Words
    7/16/12 Heat of Fusion Heat of Fusion for Ice Introduction: This lab report is a step by step process in calculating the heat of fusion for ice and to compare the differences between salt added to room temperature water and salt added to icy water. To calculate heat of fusion, one must understand heat of fusion. Heat of fusion is the amount of heat required to convert a mass of a solid at its melting point into a liquid without an increase in temperature. As difficult as this may sound,...
    1,071 Words | 3 Pages
  • Separation of Mixture - 315 Words
    Abstract By separating chemicals out of a mixture and purifying them through sublimation and recrystiliation, changes in the substances physical properties can be shown. A salicylic acid-naphthalene mixture was mixed together with diethyl ether and saturated sodium bicarbonate. Two layers separated and were extracted after acidifying with HCl. This precipitated the crude salicylic acid. The left over mixture was combined with water and the two layers separated where crude naphthalene was...
    315 Words | 1 Page
  • Buffer Systems - 1646 Words
     2012 Table of Contents Page # 1.0 Design 1.1 Focus Question 2 1.2 Hypothesis 2 1.3 Background Theory 2 1.4 Variables in the Investigation 4 1.5 Controlled Variables 5 1.6 Apparatus & Chemicals 5 1.7 Risk Assessment 6 1.8 Experimental Method 8 1.9 Lab Setup 9 1.0 Design 1.1 Focus Question What is the relationship between increasing atomic...
    1,646 Words | 9 Pages
  • Ap Chem - 395 Words
    Christina Hang Vanessa Hang Seng Xiong Period 5 December 14, 2012 Molecular Mass by Freezing Point Depression Objective: Determine the molecular mass of an unknown substance by finding the change in freezing point of a solvent when the unknown substance is dissolved in it. Qualitative Data: Trials BHT (g) Cetyl –Alcohol (g) Unknown substance (g) Melting Temperature 1 0.48 g 0 0 69.3 2 0.46 g 0.09 g 0 66.9 3 0.49 g 0 0.11 g 53.7 Analysis: 1.) Determine ___ for the solution of...
    395 Words | 2 Pages
  • Constructing Heating/Cooling Curve
    | Chemistry Lab Report | Constructing Heating/Cooling Curve | | Salman Ishaq 12-E | 1/27/2013 | | BACKGROUND As energy flows from a liquid, its temperature drops. The entropy, or random ordering of its particles, also decreases until a specific ordering of the particles results in a phase change to a solid. If energy is being released or absorbed by a substance remaining at the same temperature, this is evidence that a dramatic change in entropy, such as a phase change, is...
    2,356 Words | 9 Pages
  • Unit 4 Assessment 2-Benzoic Acid Synthesis
    Unit 4 Assessment 2-Benzoic Acid Synthesis Synthesis and Investigation of Benzoic Acid Our aims: Create benzoic acid using benzaldehyde and hydrogen peroxide. Then remove some impurities from the benzoic acid crystals. Apparatus: Titration Pipette (25 cm3) Burette (50 cm3) Retort stand Clamp Conical flask (250 cm3) Volumetric flask (250 cm3) and stopper White tile Beakers (250 cm3) Dropping pipette Filter funnel Deionised water Phenolphthalein indicator Volumetric flask...
    1,516 Words | 8 Pages
  • Simple Distillation - 1456 Words
    Determination of Melting and Boiling Point of different Organic Compounds Bakare, Abimbola Kristine, C. Professor Miranda Marilyn, school of chemical engineering and biotechnology, Mapua Institute of Technology, CHM145L-B11 ABSTRACT A melting point of a solid is the temperature at which the first crystal just starts to melt until the temperature at which the last crystal just disappears. Thus, the melting point (m.p.) is actually a melting range. The melting point of a substance depends...
    1,456 Words | 5 Pages
  • Lab 15 Chemical Physical Properties
    Lab 15: Chemical and Physical Properties Introduction Pre-lab Questions 1. Determine if the following scenarios represent a chemical or physical property. a. Dry ice (CO2) sublimes (changes from a solid to gas) at -78 ⁰C at standard atmospheric pressure. Physical b. Iron metal rusts in moist conditions. Chemical c. Hydrogen peroxide decomposes in the presences of light or heat. Chemical d. Silver metal does not react with hydrochloric acid (HCl). Chemical e. Copper is...
    651 Words | 5 Pages
  • Margarine Plant - 318 Words
    WELCOME TO MUEZ HEST INDIA PVT.LTD. www.muezhest.com PRESENTATION FOR “MARGARINE PLANT” FLOW DIAGRAM FOR MARGARINE REFINING PLANT Some Photographs of Installed Plant MARGARINE PLANT MARGARINE CRISTELISER MARGARINE PLANT ON SKID MARGARINE RE-MELT TANK MARGARINE EQUIPMENT LIST 1 3 2 Remelt Tank 6 7 Dosing Tank Blending Tank Feed Tank Performer (3 Nos.) 9 8 Water Phase Tank (2 Nos.) 5 4 Feed Pump (2 Nos.) General Accessories Maturator (2 Nos.) PERFORMANCE Fat/ Oils...
    318 Words | 5 Pages
  • Physics Final Project - 342 Words
    lObjective This experiment explores how salt and sugar affect the melting rate of ice in water. Research Questions: * Does adding salt to ice and water slow down, speed up, or not change the rate the ice melts in the water? * Is salt the only substance to have this effect? What about sugar? Knowing how to speed up the melting rate of ice is very important information for anyone who needs to de-ice roads or driveways after a winter storm. While it seems simple, adding salt to ice water...
    342 Words | 2 Pages
  • Experiment 1: Colligative Properties of Solution
    EXPERIMENT 1 COLLIGATIVE PROPERTIES OF SOLUTIONS Date: December 03, 2013 Locker 21 Members: Vanessa Olga Dagondon Christine Anne Jomocan Janica Mae Laviste Nablo Ken Menez A. TYPES OF DISPERSED SYSTEMS Results and Discussion The first part of the experiment aims to differentiate the different dispersion systems. In this experment, three systems are introduced: true solution, colloidal dispersion and coarse mixture. The said three systems are classified through a property of colloids known as...
    1,956 Words | 9 Pages
  • Chocolate investigation - 816 Words
    Aim: To investigate the difference between the melting point of dark and milk chocolate. Hypothesis: If both chocolate is heated then dark chocolate will melt faster because milk chocolate has more fats Variables (i) Independent: Two substances will be tested dark chocolate and milk chocolate. (ii) Dependent: The temperature at which each substance...
    816 Words | 4 Pages
  • Lab report - 384 Words
    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...
    384 Words | 3 Pages
  • Chem 112 Lab Report 14 Questions
    Angela Pierre Chem 112 Lab Due: 03/05/2015 Lab Report 14 Questions 1. Part A.3. Some of the cyclohexane solvent vaporized during the temperature versus time measurement. Will this loss of cyclohexane result in its freezing point being recorded as too high, too low, or unaffected? Explain. -The freezing point will be higher because the loss of solvent means that the molarity of solute is too high. The melting point will be lower than expected. 5. Part B.2. The solute dissociates slightly in...
    319 Words | 2 Pages
  • Lab 1- Synthesis of Acetaminophen
    UNIVERSITY OF WATERLOO Department of Chemistry Synthesis of ACETAMINOPHEN Laboratory Report 1 CHEM 123L January 19, 2014 Prepared for: Dr. S. Stathopulos Department of Sciences, Chemistry Faculty University of Waterloo Teaching Assistant: Aaron Chan Prepared by: Section 001 Vithurjan Satkunarasan 20495383 Lab Partner: Ken Xu Introduction The synthesis of Acetaminophen is based on the amine group of p-aminophenol being acetylated by acetic anhydride to form an amide functional...
    1,168 Words | 6 Pages
  • Determination of Unknown Polymer Properties
    Introduction and Background A multi-division corporation had a small plastic piece fail in one of its specialty machines. The maintenance department has been asked to replace the part. However, the original manufacturer, Kaufmann Ltd., has gone out of business, and specifications for the part are unavailable. The purpose of this experiment, performed by Ryan Nelson, Peter Glascor, Eric Flowr was to determine the identity of the unknown polymer by comparing its properties to properties of...
    1,170 Words | 4 Pages
  • Lauric acid - 1166 Words
    Lloyd Term 2, 2014 Lauric Acid Experiment Teacher: Mr Oliver Contents 1.0 Introduction Elements and the compounds can exist in distinctive physical states. Liquid, solid, gas and plasma. Every element and compound has a distinctive melting and boiling point. When a substance reaches its melting and boiling point it will change phase. For example the molecules in a solid being heated gain energy and eventually are able to not only vibrate...
    1,166 Words | 4 Pages
  • objective - 1179 Words
    OBJECTIVES: 1. to investigate the heating process for solid dodecanoic acid 2. to investigate the cooling process for liquid dodecanoic acid 3. to determine and compare the melting and freezing points of dodecanoic acid SUPPLIES: Equipment ring stand buret clamp hot plate test tube (18mm * 150 mm) assembly (half full with solid dodecanoic acid with thermometer embedded) beaker (400 mL) thermometer for water bath lab apron safety goggles Chemical Reagents dodecanoic acid,...
    1,179 Words | 7 Pages
  • Isolation of the Active Ingredient in an Analgesic Drug
    Isolation of the active ingredient in an Analgesic Drug from extraction, filtration and melting point. Chm237 Abstract: Acetaminaphen was crushed then extracted for the active ingredient by mixing it with methanol. Then separated from the binders by centrifugation and a filtration technique using a Pasteur pipet packed with alumina. The remaining solvent was then evaporated to yield the solid analgesic(.2295g, 45.9% yield) which was collected by filtration and tested for...
    783 Words | 4 Pages
  • bonding lab - 1066 Words
    Chemistry 332 Name ____________________ Bonding Lab Date ____________ Period ___ Introduction: Different kinds of substances have different physical properties. This can be explained by knowing that the type of bonding that occurs between the atoms of one kind of substance is different than that found in another kind of substance. Five different kinds of substances will be studied in this lab. The substances below will be tested for several different physical properties. Based on...
    1,066 Words | 5 Pages
  • Effects of Salt on Ice - 1976 Words
    Effects of Salt on Ice Bill Yongco Angela Enriquez Trisha Co Ying Huang Xu Abstract To be done when IP is completed Acknowledgments To be done when IP is completed Table of Contents Background of the Study | Pg.3 | Statement of the Problem | Pg.3 | Significance of the Study | Pg.3 | Scope and Limitations | Pg.4 | Review of Related Literature | Pg.4-5 | Methodology | Pg.6 | Results and discussion | Pg.7-8 | Conclusions | Pg.9 | Recommendation | Pg. 9 | Definition...
    1,976 Words | 8 Pages
  • lab report reduction of camphor
    Title : reduction of camphor to isoborneol Hend Altajjar Date: 01\30\2015 disk no. 116 lab report experiment procedure I scaled up 0.120 g of camphor , the I added 1.0 ml of methanol in a 10-ml Erlenmeyer flask. I stirred with a glass stirring rod until the camphor has dissolved. Then...
    442 Words | 2 Pages
  • Systhesis of Dulcin - 620 Words
    Synthesis of Dulcin Objective: The main objective of this lab is to gain experience at a typical synthesis and semi-microscale recrystallization. Discussion Questions: 1) How fast should the temperature be raised when determining a melting point? When can the temperature be raised more quickly? 2) If there is an Impurity present in a sample, what is the effect on the melting point? 3) Explain why a) salt, spread on roads in the winter, helps prevent icing in, for instance,...
    620 Words | 2 Pages
  • Casting - 5598 Words
    Manufacturing Technology – II MI 232 Instructor – Inderdeep Singh Spring 2011-2012 Foundry - Factory that produces metal castings • Casting: Process in which molten metal flows by gravity or other force into a mold where it solidifies in the shape of the mold cavity Steps: 1. Melt the material (metal) 2. Pour it into a mold 3. Let it freeze Refractory mold  pour liquid metal  solidify, remove  finish Capabilities and Advantages • Versatile: complex geometry, internal...
    5,598 Words | 29 Pages
  • Analysis of Alum Lab - 1576 Words
    AP Chemistry Analysis of Alum * Purpose: * In this lab we performed several tests to determine if our crystals were actually aluminum potassium sulfate. * Procedures: * Materials: * Chemicals: * Aluminum potassium sulfate, 2.5 g * Equipment – Part 1: * 150 mL beaker * Bunsen burner * 2 capillary tubes * Mortar and pestle * Notched stopper to hold thermometer...
    1,576 Words | 6 Pages
  • Sand Casting Techniques - 1645 Words
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