A. Na2CO3+H2SO4\(\rightarrow\)Na2SO4+H2O+CO2
Na2SO4+BaCL2\(\rightarrow\)2NaCl+BaSO4
2NaCl+2H2O-dpdd có màng ngăn\(\rightarrow\)2NaOH+H2+Cl2
2NaOH+CuCl2\(\rightarrow\)2NaCl+Cu(OH)2
Cu(OH)2\(\rightarrow\)CuO+H2O
CuO+H2SO4\(\rightarrow\)CuSO4+H2O
B. Al2O3+H2SO4\(\rightarrow\)Al2(SO4)3+H2O
Al2(SO4)3+3BaCl2\(\rightarrow\)2AlCl3+3BaSO4
AlCl3+3AgNO3\(\rightarrow\)3AgCl+Al(NO3)3