Question

Copper(II) oxide reacts with ammonia.
The left hand side of the balanced equation for this reaction is:
3 CuO + 2NH3->
What completes the equation?​

Answer 1

Answer:

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Explanation:

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Answer 2

Final answer:

The complete chemical reaction equation:

$3CuO(s)+2NH_{3}(g)$ ──→ $3Cu(s)+N_{2}(g)+3H_{2}O(l)$

Given that: We are given the left-hand side of the balanced equation for a reaction.

To find: We have to find the full reaction equation.

Explanation:

• When ammonia ($NH_{3}$) reacts with copper(II) oxide ($CuO$), it produces solid copper ($Cu$)  and liberates nitrogen ($N_{2}$) gas.

• It is an example of a redox reaction, which illustrates the reducing nature of $NH_{3}$.

• Here, the colour of black $CuO$ converted into a reddish-brown $Cu$ solid.

The balanced chemical equation for $NH_{3}$ oxidized with $CuO$ is:

$3CuO(s)+2NH_{3}(g)$ ──→ $3Cu(s)+N_{2}(g)+3H_{2}O(l)$

• The oxidation number of $Cu$ changes from 2 to 0.

The change in the oxidation number = 2

• The oxidation number of $N$ changes from -3 to 0.

For one $N$ atom, the change in the oxidation number = 3

For 2 $N$ atoms, the total change is 6.

• Hence, the required chemical equation is:  

$3CuO(s)+2NH_{3}(g)$ ──→ $3Cu(s)+N_{2}(g)+3H_{2}O(l)$

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