Write the equation of the reactions resulting in the formation of salts CuSO4, CaCl2, NaCl, BaSO4, AgCl

1) CuO + H2SO4 = CuSO4 + H2O;
Cu + 2H2SO4 (conc., Horizontal) = CuSO4 + SO2 ↑ + 2H2O;
2) Ca + 2HCl = CaCl2 + H2 ↑;
CaO + 2HCl = CaCl2 + H2O;
Ca (OH) 2 + 2HCl = CaCl2 + 2H2O;
3) 2Na + 2HCl = 2NaCl + H2 ↑;
Na2O + 2HCl = 2NaCl + H2O;
NaOH + HCl (dil.) = NaCl + H2O;
4) Ba + H2SO4 = BaSO4 ↓ + H2 ↑;
Ba (OH) 2 + H2SO4 = BaSO4 ↓ + 2H2O;
BaCl2 + H2SO4 = 2HCl + BaSO4 ↓;
5) 2Ag + Cl2 = 2AgCl ↓;
Ag2O + 2HCl = 2AgCl ↓ + H2O;
AgNO3 + HCl = HNO3 + AgCl ↓.