1)NaOH+HCl=NaCl+H2O
2NaOH+CuCl2=2NaCl+Cu(OH)2
2)BaCl2+H2SO4=BaSO4+2HCl
BaCl2+NaSO4=BaSO4+NaCl2
3)CuSO4+2HCl=2CuCl2+H2SO4
CuO+2HCl=CuCl2+H20
1)NaOH+HCl=NaCl+H2O
2NaOH+CuCl2=2NaCl+Cu(OH)2
2)BaCl2+H2SO4=BaSO4+2HCl
BaCl2+NaSO4=BaSO4+NaCl2
3)CuSO4+2HCl=2CuCl2+H2SO4
CuO+2HCl=CuCl2+H20