In acidic solution copper(I) ion is oxidized to copper(II) ion by nitrate ion.

I got Cu^+(aq) + NO_3^-(aq) --> Cu^2+(aq) + NO_3^2-(aq)but itswrong

To balance the redox reaction between copper(I) ion (Cu+) and nitrate ion (NO3-), you need to follow the steps for balancing redox reactions. Here is the correctly balanced equation:

2Cu+(aq) + 4NO3-(aq) + 4H+(aq) → 2Cu2+(aq) + 4NO2(g) + 2H2O(l)

To balance the equation, you can start by balancing the atoms other than hydrogen and oxygen. In this case, copper is balanced already. Next, you can balance the oxygen atoms by adding water molecules (H2O) to the appropriate side of the equation. In this reaction, four water molecules are added to the product side.

2Cu+(aq) + 4NO3-(aq) + 4H+(aq) → 2Cu2+(aq) + 4NO2(g) + 4H2O(l)

Now, you can balance the hydrogen atoms by adding hydrogen ions (H+) to the appropriate side of the equation. Here, four hydrogen ions are added to the reactant side.

2Cu+(aq) + 4NO3-(aq) + 4H+(aq) → 2Cu2+(aq) + 4NO2(g) + 4H2O(l)

Finally, balance the charge by adding electrons (e-) to the appropriate side of the equation. In this reaction, four electrons are added to the reactant side.

2Cu+(aq) + 4NO3-(aq) + 4H+(aq) + 4e- → 2Cu2+(aq) + 4NO2(g) + 4H2O(l)

And that's the balanced equation for the oxidation of copper(I) ion to copper(II) ion by nitrate ion in an acidic solution.