Ca + 2HBr → CaBr2 + H22Na2SO3 + 4HBr → 4NaBr + SO2 + 2H2O
C4H9COOH + Mg → (C4H9COO)2Mg + H22C4H9COOH + Li2O → 2C4H9COOLi + H2O
Ca + 2HBr → CaBr2 + H2
2Na2SO3 + 4HBr → 4NaBr + SO2 + 2H2O
C4H9COOH + Mg → (C4H9COO)2Mg + H2
2C4H9COOH + Li2O → 2C4H9COOLi + H2O