The freezing point of lauric acid was lowered by 1.68°C when a 3.706 g sample of a nondissociating molecular compound was dissolved in 40.02 g sample of lauric acid. What is the molar mass of the compound? The value of Kf for lauric acid is 3.90(°C-kg)/mol.

The freezing point of lauric acid was lowered by 1.68°C when a 3.706 g sample of a nondissociating molecular compound was dissolved in 40.02 g sample of lauric acid. What is the molar mass of the compound? The value of Kf for lauric acid is 3.90(°C-kg)/mol.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 70QRT

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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

The freezing point of lauric acid was lowered by 1.68°C when
a 3.706 g sample of a nondissociating molecular compound was
dissolved in 40.02 g sample of lauric acid.
What is the molar mass of the compound?
The value of Kf for lauric acid is 3.90(°C-kg)/mol.
b
Od
120 g/mol
215 g/mol
432 g/mol
61.2 g/mol

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