1. Using the freezing point of the solutions and the freezing point of the pure solvent, calculate the molar mass of the solute for runs 2-5 in part A. Since you know the identity of the solute, you also calculate a % error for each run.

1. Using the freezing point of the solutions and the freezing point of the pure solvent, calculate the molar mass of the solute for runs 2-5 in part A. Since you know the identity of the solute, you also calculate a % error for each run.

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter12: Solutions

Section: Chapter Questions

Problem 12.65QE

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

Data Tables:
Part A:
Run
1
2
3
4
5
Table B:
Run
1
2
Amount of Water (g)
100
100
100
100
100
Amount of Water (g)
100
100
Amount of Solute (g)
0
10.0 g Sucrose
1.7 g NaCl
7.4 g NaCl
3.2 g CaCl₂
Amount of Şx (g)
5.0 g
10.0 g
Freezing Point (°C)
0.00
-0.49
-1.07
-4.17
-1.57
Freezing Point (°C)
-0.41
-0.55

Calculations:
Part A
1. Using the freezing point of the solutions and the freezing point of the pure solvent, calculate
the molar mass of the solute for runs 2-5 in part A. Since you know the identity of the solute,
you also calculate a % error for each run.
Part B
2. Determine the molar mass of Sx from your two simulation runs in part B. Average the molar
mass and then determine what the correct elemental formula is for Sx. (x is of course an
integer). No % error calculation for this part.
Show all calculations. That's it.

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