What happens as you decrease the temperature of a solution?

a).the number of solute particles increases.
b).the number of solute particles decreases.
c).the rate of dissolution increases.
d).the rate of dissolution decreases.
e)the temperature has no effect on the rate of dissolution.

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature