Freezing Point.docx - Using Freezing-Point Depression to Find Molecular Weight OBJECTIVES In this experiment you will determine the freezing temperature

Freezing Point.docx - Using Freezing-Point Depression to...

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Using Freezing-Point Depressionto Find Molecular WeightOBJECTIVESIn this experiment, you will determine the freezing temperature of the pure solvent, lauric acid, determine the freezing temperature of a mixture of lauric acid and benzoic acid, calculate the freezing point depression of the mixture, and calculate the molecular weight of benzoic acid. m Figure 1 PRE-LABORATORY QUESTIONS 1.State the molecular basis for freezing point depression.2.Is it important to convert the temperatures measured to K? Would it make a difference in your calculations? MATERIALS
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Vernier computer interface computer Temperature Probe ring stand 400 mL beaker lauric acid, CH 3 (CH 2 ) 10 COOH lauric acid-benzoic acid mixture hot water bath two 18 150 mm test tubes utility clamp paper towel or tissue PROCEDURE 1. Obtain and wear goggles.
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  • Spring '14
  • Dr.Murphy
  • Freezing-point depression

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