Balance The Following Reaction By Oxidation Number Method. CuO + ...

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Ask a Question Balance the following reaction by oxidation number method. CuO + NH3 → Cu + N2 + H2O ← Prev Question Next Question → +1 vote 17.8k views asked Jan 22, 2022 in Chemistry by Sanjana mali (37.9k points) closed Jan 23, 2022 by Sanjana mali

Balance the following reaction by oxidation number method.

CuO + NH3 → Cu + N2 + H2O

• redox reactions
• class-11

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1 Answer

+2 votes answered Jan 22, 2022 by Niyasha (36.6k points) selected Jan 23, 2022 by Sanjana mali Best answer

Step 1: Write skeletal equation and balance the elements other than O and H.

CuO + 2NH3 → Cu + N2 + H2O

Step 2: Assign oxidation number to Cu and N. Calculate the increase and decrease in the oxidation number and make them equal.

To make the net increase and decrease equal, we must take 3 atoms of Cu and 2 atoms of N. (There are already 2 N atoms.)

3CuO + 2NH3 → 3Cu + N2 + H2O

Step 3: Balance ‘O’ atoms by adding 3H2O to the right-hand side.

3CuO + 2NH3 → 3Cu + N2 + 3H2O

Step 4: Charges are already balanced.

Step 5: Check two sides for balance of atoms and charges. The equation obtained in step 3 is balanced.

Hence, balanced equation: 3CuO + 2NH3 → 3Cu + N2 + 3H2O

commented Aug 23, 2022 by haral6326 (10 points) Thanks for helping......

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