4Na + O2 = 2Na2O
Na2O + H2O = 2NaOH
NaOH + H2SO4 = NaHSO4 + H2O
NaOH + NaHSO4 = Na2SO4 + H2O
BaCl2 + Na2SO4 = 2NaCl + BaSO4
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4Na + O2 = 2Na2O
Na2O + H2O = 2NaOH
NaOH + H2SO4 = NaHSO4 + H2O
NaOH + NaHSO4 = Na2SO4 + H2O
BaCl2 + Na2SO4 = 2NaCl + BaSO4