Calculate the freezing point of a 0.100 m aqueous solutionof K2SO4, (a) ignoring interionic attractions, and (b) takinginterionic attractions into consideration by using thevan’t Hoff factor (Table 13.4). TABLE 13.4 Measured and Expected van't HoffFactors for Several Substances at 25 °CConcentrationCompound0.100 m0.0100 m 0.00100 m Expected ValueSucrose1.001.001.001.00NaCI1.871.941.972.00K2SO42.322.702.843.00MgSO41.211.531.822.00

Answered: Image /qna-images/answer/a56177da-2ed0-4538-9910-2ff0a1a9fd23.jpg

TABLE 13.4 Measured and Expected van't Hoff Factors for Several Substances at 25 °C Concentration Compound 0.100 m 0.0100 m 0.00100 m Expected Value Sucrose 1.00 1.00 1.00 1.00 NaCI 1.87 1.94 1.97 2.00 K2SO4 2.32 2.70 2.84 3.00 MgSO4 1.21 1.53 1.82 2.00

TABLE 13.4 Measured and Expected van't Hoff Factors for Several Substances at 25 °C Concentration Compound 0.100 m 0.0100 m 0.00100 m Expected Value Sucrose 1.00 1.00 1.00 1.00 NaCI 1.87 1.94 1.97 2.00 K2SO4 2.32 2.70 2.84 3.00 MgSO4 1.21 1.53 1.82 2.00

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter6: Equilibria In Single-component Systems

Section: Chapter Questions

Problem 6.62E

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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

Calculate the freezing point of a 0.100 m aqueous solution
of K₂SO₄, (a) ignoring interionic attractions, and (b) taking
interionic attractions into consideration by using the
van’t Hoff factor (Table 13.4).

TABLE 13.4 Measured and Expected van't Hoff
Factors for Several Substances at 25 °C
Concentration
Compound
0.100 m
0.0100 m 0.00100 m Expected Value
Sucrose
1.00
1.00
1.00
1.00
NaCI
1.87
1.94
1.97
2.00
K2SO4
2.32
2.70
2.84
3.00
MgSO4
1.21
1.53
1.82
2.00

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