Question

State the method only, generally used for the preparation of the following salts

(1) Zn(NO₃)₂

(2) NH₄Cl

(3) ZnSO₄

(4) ZnS

(5) CaCO₃

(6) FeCl₃

(7) PbCl₂

(8) Pb(NO₃)₂

Answer 1

Salt	Method of preparation
1.  Zn(NO3)2	Neutralisation of insoluble base by acid/Decomposition of insoluble carbonate by acid
2.  NH4Cl	Neutralisation (titration) of soluble base by acid/Decomposition of soluble carbonate by acid
3.  ZnSO4	Neutralisation of insoluble base by acid/Decomposition of insoluble carbonate by acid
4. ZnS	Direct combination (Synthesis)/Double decomposition (Precipitation)
5. CaCO3	Double decomposition (Precipitation)
6. FeCl3	Direct combination (Synthesis)
7. PbCl2	Double decomposition (Precipitation)
8. Pb(NO3)2	Neutralisation of insoluble base by acid/Decompostion of insoluble carbonate by acids