Mg+2HCl=MgCl2+H2；Mg+H2SO4=MgSO4+H22Al+6HCl=2AlCl3+3H2；2Al+3H2SO4=Al2(SO4)3+3H2Fe+2HCl=FeCl2+H2；Fe+H2SO4=FeSO4+H2Zn+2HCl=ZnCl2+H2；Zn+H2SO4=ZnSO4+H2生成的氢气都应标有气体符号（这里懒的写了）...