2Mg+O2 -t°->2MgO(1)
4Al+3O2 - t°->2Al2O3( 2)
2Cu+O2 - t°->2CuO(3)
MgO+2HClàMgCl2+H2O(4)
Al2O3+6HClà2AlCl3+3H2O(5)
CuO+2HClà CuCl2+H2O(6)
MgO+H2SO4àMgSO4+H2O(7)
Al2O3+3H2SO4àAl2(SO4)3+3H2O(8)
CuO+H2SO4àCuSO4+H2O(9)
-∑mO=34,14-23,676=10,464(g)<->0,654(mol)
-Theo pt(4,5,6,7,8,9):nH=2nO=2*0,654=1,308(mol)
Đặt V axit=V(l)
=>nHCl=3V;nH2SO4=1,5V
Ta có: ∑nH=3V + 1,5V*2=1,308
=>V=0,218(l)=218ml