(1) If 0.43g of aluminum foil was dissolved in sufficient 3M of KOH solution, and the solution was acidified with 4M H2SO4, what is the theoretical yield of KAl(SO4)2 x 12H2O?

(2) If only 5.87g of alum were obtained as product from the synthesis described in (1), what was the percent yield?

(3) A student determined the Kf (f as lower subscript) of t-butyl alcohol using tap water instead of distilled or deionized water. Describe the problems that might have been encountered. How would these problems affect the magnitude of Kf?