chem 1412 lab 1 (revised) - Molecular Mass Determination by Freezing Point Depression in t-Butyl Alcohol CHEM 1412 Experiment 1 Lab Report February 7

chem 1412 lab 1 (revised) - Molecular Mass Determination by...

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Molecular Mass Determination by Freezing Point Depression in t -Butyl Alcohol CHEM 1412: Experiment 1 Lab Report February 7, 2016 Molecular Mass Determination by Freezing Point Depression in t -Butyl Alcohol Lab Partners: Objective: The objective behind this experiment is to determine the molecular mass of unknown solvent by using colligative property of freezing point depression. By studying changes when unknown substance is added, data can be obtained to identify of the unknown substance. Prelab Questions: 1.A student beginning this experiment accidentally spilled some t-butyl alcohol on his hands on the laboratory bench. Describe any potential danger this situation might cause and state the proper method of cleaning up from the accident. t-
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5.00 mL of a nonionic liquid unknown, are given below. The density of the unknown was714 g mL-1 . The Kf of nitrobenzene is 6.87 Celsius Kg mol-1 1)Using the graph paper on the next page, draw the cooling curve for nitrobenzene. . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0.00 5.00 10.00 15.00 20.00 25.00 30.00 12.50 10.75 8.75 6.50 4.80 4.50 4.25 4.50 5.00 5.305.305.305.305.305.205.205.205.205.205.20 Cooling Curve for Nitrobenzene Time in minutes Temperature in Celsius
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