4Na + O2= 2Na2O
2Na2O + 2H2O= 4NaOH и Na2O +2H2CO3= 2NaCO3 + 2H2O
NaOH + K2SO4 = Na2SO4 + KOH
Na2SO4 + CaCl = NaCl + CaSO4
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4Na + O2= 2Na2O
2Na2O + 2H2O= 4NaOH и Na2O +2H2CO3= 2NaCO3 + 2H2O
NaOH + K2SO4 = Na2SO4 + KOH
Na2SO4 + CaCl = NaCl + CaSO4