题目内容
(1)2Al+3H2SO4====Al2(SO4)3+3H2↑
(2)3S+6KOH====K2SO3+2K2S+3H2O
(1)3Cu+8HNO3(稀)=====3Cu(NO3)2+2NO↑+4H2O
(2)2H2S+SO2====3S+2H2O