Write the reaction equations: Cu – Cu (NO3) 2 – CuO – CuSO4 – Cu ZnS – ZnO – ZnSO4 – Zn (OH) 2 – ZnO – ZnFe – FeCl3 – Fe (OH) 3 – Fe2O3 – FePO4
Cu + 4HNO3 = Cu (NO3) 2 + 2NO2 + 2H2O
2Cu (NO3) 2 = 2CuO + 4NO2 + O2. Decomposition on heating (T more than 170 ° C).
CuO + H2SO4 = CuSO4 + H2O
CuSO4 + Zn = ZnSO4 + Cu
ZnS + O2 = ZnO + SO2
ZnO + H2SO4 = ZnSO4 + H2O
ZnSO4 + 2KOH = Zn (OH) 2 + K2SO4
Zn (OH) 2 = ZnO + H2O. When heated.
ZnO + H2 = Zn + H2O
2Fe + 3Cl2 = 2FeCl3
FeCl3 + 3KOH = Fe (OH) 3 + 3KCl
Fe (OH) 3 = Fe2O3 + H2O
3Fe2O3 + 4H3PO4 = 2Fe3 (PO4) 2 + 6H2O
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