Question

Na+HOH-->
Na2O+HOH-->
NaOH+HCl-->
NaOH+CuSO4-->
NaOH+CO2-->
Hg(No3)2+Cu-->
Cu+FeSo4--

Answer 1

2Na+ 2H2O =2 NaOH + H2

Na2O + H2O = 2NaOH

NaOH + HCl = NaCl + H2O

2NaOH + CuSO4 = Cu(OH)2 + Na2SO4

2NaOH + CO2 = Na2CO3 + H2O

Hg(NO3)2 + Cu = Cu(NO3)2 + Hg

Cu + FeSO4   реакция не идёт