A solid substance A is soluble in water to the extent of 10 mg/mL of water at 25 °C and 100 mg/mL of water at 100 °C. You have a sample that contains 100 mg of A and an impurity B. a. Assuming that 2 mg of B is present along with 100 mg of A, describe how you could purify A if B is completely insoluble in water. b. Assume that 2 mg of the impurity B is present along with 100 mg of A, describe how you could purify A if B had the same solubility behavior as A. Would one crystallization produce pure A?

A solid substance A is soluble in water to the extent of 10 mg/mL of water at 25 °C and 100 mg/mL of water at 100 °C. You have a sample that contains 100 mg of A and an impurity B. a. Assuming that 2 mg of B is present along with 100 mg of A, describe how you could purify A if B is completely insoluble in water. b. Assume that 2 mg of the impurity B is present along with 100 mg of A, describe how you could purify A if B had the same solubility behavior as A. Would one crystallization produce pure 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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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

A solid substance A is soluble in water to the extent of 10 mg/mL of water at 25 °C and 100
mg/mL of water at 100 °C. You have a sample that contains 100 mg of A and an impurity B.
a. Assuming that 2 mg of B is present along with 100 mg of A, describe how you could
purify A if B is completely insoluble in water.
b. Assume that 2 mg of the impurity B is present along with 100 mg of A, describe how you
could purify A if B had the same solubility behavior as A. Would one crystallization
produce pure A?

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