Lab: Molar Mass by Freezing Point DepressionColligative properties can be used to determine the...

Question

Lab: Molar Mass by Freezing Point Depression
Colligative properties can be used to determine the molar mass of a compound by relating the decrease in freezing point (or increase in boiling point) to the particle molality of a solution. In this lab, you will measure the freezing point of a pure solvent (lauric acid). Then you will measure the freezing point of a solution using the same solvent and a solute (lauric acid with benzoic acid). The amount the freezing point is lowered from the pure solvent will allow you to determine the molality and ultimately the molar mass of the benzoic acid solute.

View the Molar Mass by Freezing Point Depression power point attached below.This will provide you with the necessary foundation for safely and successfully completing the lab.

Note:While you work on the lab,you are required to take certain images/photos of your labto document that you actually completed the lab yourself. Each photo should include anote card or a piece of paper with your name, the date you completed the experiment and your course section numberclearly visible.

Note Card Information:
My Name: Zack Aldawoody

Section Number:145454
Download the item:Molar Mass by Freezing Point Depression Lab Report attached below. This is what you will submit for grading. You can type your results and insert your images into this document.

molar-mass-by-freezing-point-depression-power-point-j4j4kipo.pdf molar-mass-by-freezing-point-depression-lab-report-aovqrrst.docx

Neelakshi · Accepted Answer

Molar Mass Determination by 
Freezing Point Depression 
Activity 1: Freezing Point of Pure Lauric Acid & Activity 2: 
Freezing Point of a Lauric Acid/Benzoic Acid Mixture 
Data Table 1 
(2 points) Complete the information below based on Data Table 1: Cooling Data 
for Activities 1 and 2 from the Investigation Manual. Note: You may not need to 
enter temperatures for every time shown. 
Time 
(mm:ss) 
Pure Lauric Acid 
Lauric Acid + 0.4g 
Benzoic Acid 
Lauric Acid + 0.5 g 
Benzoic Acid 
 Temperature in ° C Temperature in ° C Temperature in ° C 
0:00 65.0 65.0 65.0 
0:30 66 66 66 
1:00 67 67 67 
1:30 68 68 68 
2:00 69 69 69 
2:30 70 70 70 
3:00 71 71 71 
3:30 72 72 72 
4:00 73 73 73 
4:30 74 74 74 
5:00 75 75 75 
5:30 76 76 76 
6:00 78 78 78 
6:30 79 79 79 
7:00 80 80 80 
7:30 81 81 81 
8:00 82 82 82 
8:30 83 83  83 
9:00 84 84 84 
9:30 85 85 85 
10:00 86 86 86
Data Table 2 
(3 points) Complete the information below based on Data Table 2: Molar Mass of 
Benzoic Acid Data in the Investigation Manual. 
Molar Mass of 
Benzoic Acid 
Pure Lauric Acid 
Lauric Acid + 0.4 
g Benzoic Acid 
Lauric Acid + 0.

Lab: Molar Mass by Freezing Point Depression Colligative properties can be used to determine the molar mass of a compound by relating the decrease in freezing point (or increase in boiling point) to...

Note Card Information:
My Name: Zack Aldawoody

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Lab: Molar Mass by Freezing Point Depression Colligative properties can be used to determine the molar mass of a compound by relating the decrease in freezing point (or increase in boiling point) to...

Note Card Information:My Name: Zack Aldawoody

Solution

Answer To This Question Is Available To Download

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Submit New Assignment

Note Card Information:
My Name: Zack Aldawoody