Amixture contains only nacl and al2(so4)3 . a 1.45-g sample of the mixture is dissolved in water, and an excess of is added, producing a precipitate of ‍ al(oh)3. the precipitate is filtered, dried, and weighed. the mass of the precipitate is g. what is the mass percent of ‍ in the sample?

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices