You want to purify 10.0 g of benzoic acid that has been contaminated with 0.2 g of salicylic acid According to the Merck Index, water solubilities of the two compounds are as follows:

Benzoic acid H20 Solubility (g/10 mL) Salicylic acid H20 Solubility (g/10 ml) Temperature (°C)
0.029 0.020 20
0.221 80
0.680 95

a. What volume of boiling water (mL) is needed to dissolve the 10.0 g of benzoic acid?
b. When the water is cooled back to room temperature what percentage of the original benzoic acid and salicylic acid remain in solution?