Answered: The solubility of a compound with a…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The solubility of a compound with a molecular weight of 242.7 is determined to be 26.0 g in 75.0 g of water at 398 K. Express this concentration in terms of molality.

Expert Solution

Step 1

The number of moles for a given chemical species refers to the ratio of mass of the species to that of its molar mass. The formula is shown below:

Step 2

The term molality refers to the ratio of number of moles of the given solute to the amount of solvent in kilogram. The formula is as follows:

Step 3

In the given problem, the mass of the solute is given to be 26.0 g.

The mass of the solvent water is given to be 75.0 g at 398 K.

The molar mass of the compound is given to be 242.7 g/mol.

The number of moles of the compound can be determined as follows:

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