Ответы на вопрос:
Объяснение:
1) 4Na + O2 = 2Na2O
Na2O + H2O = 2NaOH
2NaOH + H2SO4 = Na2SO4 + 2H2O
2Na + 2H2O = 2NaOH + H2
Na2O + 2HCl = 2NaCl + H2O
2) 2Mg + O2 = 2MgO
MgO + H2O = Mg(OH)2
3Mg(OH)2 + 2H3PO4 = Mg3(PO4)2 + 6H2O
3) 2Ca + O2 = 2CaO
CaO + H2O = Ca(OH)2
Ca(OH)2 + 2HCl = CaCl2 + 2H2O
CaO + H2SO4 = CaSO4 + H2O
Ca(OH)2 + SO2 = CaSO3 + H2O
4) S + O2 = SO2
2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
H2SO4 + 2KOH = K2SO4 + 2H2O
4K + O2 = 2K2O
K2O + H2O = 2KOH
2KOH + H2SO4 = K2SO4 + 2H2O
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