在H2SO4溶液中分别滴加(或加入)少量的下列溶液(或物质): ①CH3COONa溶液 ②氨水 ③Cu(OH)2④Zn粒 ⑤Fe2O3粉末。写出反应的现象和有关的离子方程式。 ①_______________________,_________________________ ______________________ ②____________________,_________________________________________________ ③_______________________,___________________________________________________ ④_______________________,________________________________________________ ⑤_______________________,____________________________________________ |