• Using Freezing-Point Depression to Find Molecular Weight Formal Lab Report
    Using Freezing-Point Depression to Find Molecular Weight Formal Lab Report Purpose: The purpose of this lab is to be able to use the freezing point of a substance to find the molecular weight of it. To do this, we will use the Logger Pro program to obtain the freezing point of lauric acid and...
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  • Molecular Weight by Freezing Point Depression
    freezing point of pure naphthalene using your thermometer. 2. Determine the molecular weight of sulfur using the freezing point depression data. Report a percent error. From the molal concentration of your solution, calculate the quantity of solute which would be present in 1000 g of naphthalene. 3...
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  • Pure Water Graph
    Colligative Properties & Osmotic Pressure 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...
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  • Ap Chemistry 1
    * Solution Composition * Factors affecting solubility * Vapor Pressure of Solutions and Osmotic Pressure * Boiling Point Elevation and Freezing Point Depression * Colligative Properties of Electrolyte Solutions * Colloids E06 - Kinetics: Chapter 12 * Reaction...
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  • Freezing point depression lab
    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...
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  • Roberto Y Montecarlo
    boiling point depression, using molality. The equation for temperature depression or expansion is ΔT= Kf × m Where: ΔT is temperature depression (for freezing point) or temperature expansion (for boiling point) (°C) Kf is the freezing point constant (kg °C/mol) m is molality in mol/kg...
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  • salt solution
    scientific facts that state that salt solutions will have a lower freezing point depression than sugar solutions because NaCl contain fewer particles compared to Sucrose. This can be proven because the molecular weight of NaCl is 58.44 grams per mole compared to 342.3 grams per mole of Sucrose. NaCl nearly...
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  • Report
    -electrolytes 6. solve problems involving freezing point depression, boiling point elevation, vapor pressure lowering, and increase in osmotic pressure 7. use Raoult’s Law to relate vapor pressure lowering to solute mole fraction 8. explain different properties of colloidal systems such as size of particles...
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  • 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...
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  • Colligative Props Lab
    Chemistry Name: Colligative Properties Lab Blk: Date: Freezing Point Depression of Acetic Acid – Acetamide Solution Lab#________ Introduction: How does antifreeze lower the freezing point of water in the cooling systems of automobiles? In the late nineteenth century the...
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  • What Makes Ice Melt Faster
    monitor the temperature regularly throughout your experiment. • For a related, more advanced experiment on freezing point depression, see the Science Buddies project Chemistry of Ice-Cream Making: Lowering the Freezing Point of Water • Do you think salt would melt ice in your freezer? Why or why not? Try it and find out....
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  • Chemistry Lab
    Chemistry 121 Colligative Properties Lab Demonstration of Selected Calculations from Choice I Determination of Kf for Naphthalene To determine the Kf for naphthalene, we need to find the difference in the freezing point of pure naphthalene and the solution of 1,4-dichlorobenzene in naphthalene...
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  • Colligative Properties & Osmotic Pressure
    present, not the identity of those solute particles. These properties include: vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure” (p. 17 lab manual). In this experiment freezing point depression is illustrated by comparing the freezing point of distilled...
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  • Chemistry 16 Lab Manual
    the temperature from time to time. Notice the increase in the normal boiling point of 100oC. QUESTIONS Based on the observed temperature changes, compute the weight of the salt added to the solution to cause the freezing point depression and boiling point elevation. Compare with the actual value....
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  • Chemistry Formula
    weight is calculated as The boiling point of a solution was used to determine that santonic acid has a molecular mass of approximately 246. You can also find this value by using the freezing point of the solution. In the two previous examples, the sucrose and santonic acid existed in solution as...
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  • Intermolecular Forces
    . Intermolecular Forces Worksheet Answers 1) Using your knowledge of molecular structure, identify the main intermolecular force in the following compounds. You may find it useful to draw Lewis structures to find your answer. a) b) c) 2) PF3 H2CO HF dipole-dipole force dipole-dipole force...
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  • Deicer Magnesium Chloride
    factor by using Equation 2. This originated from the freezing point depression equation: i = ΔT/((Kf)(m)) (Equation 2) The freezing point constant (Kf) of water is 1.86 °C m-1. Each mass amount and Van’t Hoff factor was calculated then analyzed in a table. Experiment 2: Experiment 2...
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  • Freezing Point Depression
    . Online lab manual. Winter 2012. Experiment #6 2. Atkins, Peter, De Paula, Julio, Physical Chemistry, W. H. Freeman and Company, New York (2010) Introduction In experiment #6 “Freezing Point Depression”, the effects on the freezing point of dissolving a solute in a solvent was explored from a...
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  • Chem
    -polyacrylamide gel electrophoresis (SDS-PAGE) to determine molecular weight and purity of the recovered proteins 15 Protein characterization by fluorescence spectroscopy 16 Final formal research lab report in the style of Biochemistry 84-89 90-96 97-98 69-73 74-83 Appendices: pET-15b vector, Rubric for final...
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  • Laboratory Techniques and Measurements
    Laboratory Techniques and Measurements Peter Jeschofnig, Ph.D. Version 42-0165-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant...
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