1) 2Al + 3H2SO4 = Al2(SO4)3 + 3H2↑
2) MgCl2 + 2HBr = MgBr2 + 2HCl
3) 3CuCl2 + 2Cr = 2CrCl3 + 3Cu
4) Fe2O3+Mg = 3MgO + 2Fe
1) 2Al + 3H2SO4 = Al2(SO4)3 + 3H2↑
2) MgCl2 + 2HBr = MgBr2 + 2HCl
3) 3CuCl2 + 2Cr = 2CrCl3 + 3Cu
4) Fe2O3+Mg = 3MgO + 2Fe