When dissolving a solid or liquid, as the temperature of the solvent increases, the rate of dissolution?
A. increases.
B. decreases.
C. stays the same.
D. either increases or decreases, depending upon the liquid.

D

Explanation:  As temperature increases, the solubility of a solid or liquid can increase or decrease depending on whether the dissolution reaction is exothermic or endothermic. In endothermic reactions, the net energy from the bonds breaking and forming results in heat energy being absorbed when the solute dissolves in solution.

Explanation:

Fractional distillation of dilute nitric acid will enable you to collect pure water from the top of the fractionating column. As the acid loses water, it becomes more concentrated. Its concentration gradually increases until it gets to 10percent by mass of nitric acid. this is all i know and i hope it helps