a. Freezing point of pure water, Tf = 0 °C Freezing point of solution, Tf = -0. 34 °C Freezing point depression, ATf = ..0- (-0.34)) = 0.34°C %3D Molal freezing point depression of water, Kf = …1.86°C kg/mol wwwm b. Molality of solution, m = …. C. Molecular weight of solute, MWs = ...

a. Freezing point of pure water, Tf = 0 °C Freezing point of solution, Tf = -0. 34 °C Freezing point depression, ATf = ..0- (-0.34)) = 0.34°C %3D Molal freezing point depression of water, Kf = …1.86°C kg/mol wwwm b. Molality of solution, m = …. C. Molecular weight of solute, MWs = ...

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter10: Properties Of Solutions

Section: Chapter Questions

Problem 7RQ

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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

1. The freezing point datas of pure water and 150 grams of H20 that includes 10 g of sucrose
(C12H22011) are given below. According to these datas, calculate the molecular weight of 10 g
sucrose (C12H22011) dissolved in 150 g of H2O.
a. Freezing point of pure water, Tf = 0 °C
Freezing point of solution, Tf = -0. 34 °C
Freezing point depression, ATf = ... (0- (-0.34)) = 0.34°C
Molal freezing point depression of water, Kf = •.1.86°C kg/mol
b. Molality of solution, m = .
c. Molecular weight of solute, MWs = ..
%3D
2. Find the theoretical molecular weight of solute in literature and calculate the percentage
error in molecular weight.
MWs, real =
Error%=

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