Write down the reaction equations that result in a) zinc nitrate, b) copper (II) chloride.

Write down the reaction equations that result in a) zinc nitrate, b) copper (II) chloride. Try to find as many fundamentally different ways as possible.

a)
1. Zinc react with concentrated and diluted nitric acid:
4Zn + 4HNO3 (conc.) = Zn (NO3) 2 + 2NO2 ↑ + 2H2O;
3Zn + 8HNO3 (expanded) = 3Zn (NO3) 2 + 2NO ↑ + 4H2O.
2. Reaction of zinc oxide with nitric acid:
ZnO + 2HNO3 = Zn (NO3) 2 + H2O.
3. Reaction of zinc hydroxide with nitric acid:
Zn (OH) 2 + 2HNO3 = Zn (NO3) 2 + 2H2O.

b)
Obtaining copper (II) chloride.
1. Cu + Cl = CuCl2.
2. CuO + 2HCl = CuCl2 + H2O.
3. Cu (OH) 2 + 2HCL = CuCl2 + 2H2O (neutralization reaction).
4. CuCO3 + 2HCl = CuCl2 + CO2 ↑ + H2O.