(1)写出下列物质发生水解反应的离子方程式,并指出水溶液的酸碱性: ①NaHS_________________ ②NaHPO 4 _________________ ③CH 3 COONH 4 _________________ ④NaHSO 3 _________________ ⑤NaH 2 PO 4 _________________ ⑥CuSO 4 _________________ (2)写出下列各组盐溶液混合后发生反应的离子方程式: ①FeCl 3 和Na 2 CO 3 _________________ ②CuSO 4 和Na 2 S_________________ ③AlCO 3 和Na 2 S_________________ ④Na 2 SiO 3 和NH 4 Cl_________________ ⑤Al 2 (SO 4 ) 3 和Na 2 CO 3 _________________ ⑥Al 2 (SO 4 ) 3 和NaHCO 3 _________________