【答案】应助回帖

Originally posted by 朱小明1985 at 2011-04-06 15:16:03:
Sodium monohydrogen phosphate Na2HP04-12H20 (18 g) is dissolved in a mixture of perchloric acid (73 mL, 11.7 F) and water (20 mL). The solution is cooled to -10 OC. Then a solution of sodium molybd ...