1&3 please!!!!!

Questions 1. The solubility of a compound in water at 10C is 0.46g/100mL, and in ethanol at 10C it is 1.86 g/100mL. Assume the solubility of the compound in boiled water and boiled ethanol are approximate same, indicate (briefly describe your reasons) which would likely be a better recrystallization solvent. 2. A 5.4g sample of D/L-serine was recrystallized using 35mL of boiling water and then was cooled to 0 C. If the solubility of D/L-serine in boiling water is 32.2g/100g and at 0C is 2.2g/100g, determine the mass of D/L-serine that will be isolated from the solution at 0C. 3. A student determines that a white crystalline compound melts at 124C and then sets the tested sample aside to cool. When the melting-point analysis is repeated with the cooled sample, he finds a melting point of 144C. Provide a possible explanation for the change in the observed melting point