How to get Cu from Cu (NO3) 2?

There are two ways to separate copper from a solution of its salt. The first is the displacement of copper by a more active metal, for example, zinc:

Zn + Cu (NO3) 2 = Cu + Zn (NO3) 2;

The second way is electrolysis of a salt solution:

2H2O + 2Cu (NO3) 2 = 4HNO3 + O2 + Cu.

It is also possible to obtain copper as a result of a two-stage process: thermal decomposition of the salt and the subsequent reduction of the resulting copper oxide:

2Cu (NO3) 2 = 2CuO + 4NO2 + O2;

CuO + H2 = Cu + H2O.