2Na + O2 = Na2O2

Na2O2 + 2Na = 2Na2O

Na2O + H2O = 2NaOH

2NaOH + H2SO4 = Na2SO4 + 2H2O

Na2SO4+CaCl2=CaSO4 +2NaCl

2NaCl = 2Na + Cl2 

 

Составить для 4и5 сокращеное ионно молекулярное уравнени 

 

Для 1и2 схему электронного баланса

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