能與鋁作用生成氫氣,要麼是酸性溶液,要麼是鹼性溶液例如:
2al+6hcl=2alcl3+3h2↑
2al+3h2so4(稀)=al2(so4)3+3h2↑
2al+2naoh+2h2o=2naalo2+3h2↑