Ca + 2H2O = Ca(OH)2 + H2
Ca(OH)2 + HBr = CaBr2 + 2H2O
CaBr2 + H2 = Ca + 2HBr
Zn(NO3)2 + 2KOH = Zn(OH)2 + 2KNO3
Zn(OH)2 + 2HCl = ZnCl2 + 2H2O
ZnCl2 + 2Ba(OH)2 = BaZnO2 + BaCl2 + 2H2O
Ca + 2H2O = Ca(OH)2 + H2
Ca(OH)2 + HBr = CaBr2 + 2H2O
CaBr2 + H2 = Ca + 2HBr
Zn(NO3)2 + 2KOH = Zn(OH)2 + 2KNO3
Zn(OH)2 + 2HCl = ZnCl2 + 2H2O
ZnCl2 + 2Ba(OH)2 = BaZnO2 + BaCl2 + 2H2O