Question

Please provide a calculation for the answer to the question below:

Question The solubility of a compound is 59 g per 100 mL in boiling methanol and 30 g per 100 mL in cold methanol, whereas its solubility in water is 7.2 g per 100 mL at 95°C and 0.22 g per 100 mL at 2°C. Which solvent would be better for recrystallization? Explain why.

Answer The solubility of a compound should be in hot solvent and low in cold. As 30 g/ 100 mL is as good as 59 g/mL cannot use methanol as a solvent; however, the solubility at 95°C is high enough (7.2 g/mL) while it is sparingly soluble at 2°C.