Na2O
MgO
Al2O3
Fe2O3
CuO
2Na + 2H+ = H2 + 2Na+
Mg + 2H+ = H2 + Mg2+
2Al + 6H+ = 2Al3+ + 3 H2
Fe + 2 H+ = H2 + Fe2+
铜与一般的酸不反应,除非是强氧化性酸.