Question

cuO + 2NH3-cu+N2+H2O​

Answer 1

Explanation:

The unbalanced redox equation is as follows:

CuO+NH3→Cu+N2+H2O

Balance all atoms other than H and O.

CuO+2NH3→Cu+N2+H2O

The oxidation number of Cu changes from 2 to 0. The change in the oxidation number of Cu is 2.

The oxidation number of N changes from -3 to 0. The change in the oxidation number of one atom of N is 3. For 2 N atoms, the total change is 6.

The increase in the oxidation number is balanced with decrease in the oxidation number by multiplying CuO and Cu with 3.

3CuO+2NH3→3Cu+N2+H2O

O atoms are balanced by adding 2 water molecule on RHS.

3CuO+2NH3→3Cu+N2+3H2O

H atoms are balanced.

This is the balanced chemical equation.