Question

CuO + NH3 = Cu + N2 + H2O

balance the equation by oxidation no. method.

Answer 1

3CuO+2NH3=3Cu+N2+3H2O

Answer 2

Explanation:

The given reaction is as follows.

     $CuO + NH_{3} \rightarrow Cu + N_{2} + H_{2}O$

Hence, oxidation state of the reactant atoms are as follows.

Cu = +2,    O = -2, N = -3, H = +1

Oxidation state of the product atoms are as follows.

Cu = 0,  $N_{2}$ = 0,  H = +1,  O = -2

Therefore, balancing the given equation by oxidation method is as follows.

        $3CuO + 2NH_{3} \rightarrow 3Cu + N_{2} + 3H_{2}O$