Post-Lab Report for Experiment 2: Cooperative Identification of an organic Solid October 6‚ 2013 Introduction: This experiment was focused on the cooperative identification of organic compound by its chemical properties such as: slow melting point‚ mixed melting point‚ Rf values in TLC experiment‚ IR spectrum analysis‚ and H NMR spectra. Such data can provide the the identity of functional groups and the identity of the compound itself. In this experiment
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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
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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% error
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Lab 2 “Separation of a Mixture of Solids Lab Report Assistant (10 points) Data Table 1: Experimental Data Grams Percent of mixture Iron (Fe) fillings 0.9 g 20 % Sand 1.2 g 25 % Table salt 1.6 g 25 % Benzoic acid .8 g 16 % Total 4.5 g 86 & Questions A. How did your proposed Procedures or flow charts at the beginning of this experiment compare to the actual Procedures of this lab exercise? (2 points) I proposed a magnet would be the used to remove the iron from
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Title: Lab #3 Separation of a Mixture of Solids Purpose: To understand the different separation methods and techniques that depend on the chemical properties of a specific substance. Also to become more comfortable with performing those actions of separation so I have them in the future. For this experiment‚ I will separate a mixture of four distinct substances: sodium chloride‚ benzoic acid‚ silicon dioxide‚ and iron fillings into pure beings. Procedure: Materials: distilled water coffee
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information about boiling water. If you cover the tin and allow the water and air to cool down‚ the air will cool and contract‚ lowering the pressure in the tin. If it lowers enough‚ the partial vacuum will collapse the walls of the can! The boiling point definitely reduces with air pressure. There is a famous demonstration where boiling water or coffee is drunk‚ the trick is it was in a vacuum chamber where it boiled at room temperature. The actual definition of the boiling point of water is the
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SHORT INTRODUCTION TO TWO-PHASE FLOWS Condensation and boiling heat transfer Herv´ Lemonnier e DM2S/STMF/LIEFT‚ CEA/Grenoble‚ 38054 Grenoble Cedex 9 Ph. +33(0)4 38 78 45 40‚ herve.lemonnier@cea.fr herve.lemonnier.sci.free.fr/TPF/TPF.htm ECP‚ 2011-2012 HEAT TRANSFER MECHANISMS • Condensation heat transfer: – drop condensation – film condensation • Boiling heat transfer: – Pool boiling‚ natural convection‚ ´bullition en vase e – Convective boiling‚ forced convection‚ • Only for pure fluids. For mixtures
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procedure‚ what is the name of the indicator used to identify the presence of CO2? Phenol Red 4. B. What color did the indicator turn after blowing air into the water through the straw? Yellow 5. A. What color did the indicator turn after the tube was placed under a light source for 30 minutes? Light red 5. B. Why did this occur? Because the light‚ water‚ and CO2 were creating photosynthesis. 6. List the four common pigments found in plants and their functions. 1. Anthocyanin is red or purple
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GS104 Lab Report Experiment # 5 Pendulum and the Calculation of g David Case: February 14‚ 2015 Experiment #5 Pendulum and the Calculation of g Objectives: To calculate the acceleration due to gravity by observing the motion of a pendulum. To investigate the effect of varying mass on the period of a pendulum. To investigate the effect of varying the length of a pendulum on the period Materials: stopwatch support for the pendulum
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2:05 P.M. Purpose: The purpose of the experiment is to measure the densities of liquids. Specifically‚ the two liquids that were used and measured in the research were deionized water (H2O) and alcohol (C2H5OH). Methods: Density is an intensive quantity that cannot be visually identified. Therefore‚ the most straightforward approach to this problem was to record the measurements of mass and volume. For volume of each liquid‚ the instruments used were a 50ml burette‚ a 50ml graduated cylinder and a 10ml
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