Question

Cu + No3- = Cu+2 +No​

Answer 1

Explanation:

2AgNO 3+Cu⟶2Ag+Cu(NO3)2

Answer 2

Answer:

Please give me a Brain mark

Explanation:

Correct option is D) none of these

The unbalanced redox equation is as follows:

Cu+NO

3

→Cu 2+NO 2

All atoms other than H and O are balanced.

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

The oxidation number of N changes from 5 to 4. The change in the oxidation number of N is 1.

The increase in the oxidation number is balanced with decrease in the oxidation number by multiplying NO

3and NO 2

with 2..

Cu+2NO3→Cu 2+2NO 2

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

Cu+2NO 3

→Cu 2 +2NO 2+2H 2O

To balance H atoms, add 4 H

on LHS.

Cu+2NO 3+4H + →Cu 2+ +2NO 2+2H 2 O

Since the reaction occurs in basic medium, add 4 hydroxide ions on both sides of the equation.

Cu+2NO 3+4H +4OH →Cu 2 +2NO2 +2H2O+4OH

On LHS, 4 H +

ions combine with 4 OH

ions to form 4 water molecules out of which 2 water molecules cancel out with 2 water molecules on RHS.

Cu+2NO 3+2H 2O→Cu 2 +2NO 2+4OH −

This is the balanced chemical equation.