Ca + 2H2O = Ca(OH)2 + H2
Ca(OH)2 + 2HCl = CaCl2 + 2H2O
CaCl2 + H2SO4 = CaSO4 + 2HCl
Ba + 2HCl = BaCl2 + H2
Ca + 2H2O = Ca(OH)2 + H2
Ca(OH)2 + 2HCl = CaCl2 + 2H2O
CaCl2 + H2SO4 = CaSO4 + 2HCl
Ba + 2HCl = BaCl2 + H2