2Al + 6HCl ====2AlCl3 +3H2
6mol 3mol
2Al +2NaOH +2H2O ===2NaAlO2 +3H2
2mol 3mol
6mol x=9mol
等物质的量浓度,等体积的HCl和NaOH反应生成氢气的量:3:9=1:3