10. Consider the following table of compound and their solubility in hot and cold water, and in hot and cold ethanol: Solubility in grams per liter (g/L) Cold Water 3.53 23.6 Compound Hot Water 5.11 Hot Methanol Cold Methanol 14.6 12.8 0.81 26.4 18.9 1.36 55.2 C 7.14 1.52 0.012 D 21.3 0.76 51.7 a. Which of the compound(s) above could be effectively recrystallized from methanol? Explain your answer. b. Assume you were given 5 g of a mixture of C and D (unknown ratio). Devise a plan to separate and purify them. Hint: methanol has lower boiling point (64.7 °C) than water (100 °C) and easily evaporated under low pressure.

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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.