Question

The following chemical reaction takes place in aqueous solution:

CuSO4(aq) + KS(aq) → CuS(s) + K2SO4(aq)
Write the net ionic equation for this reaction

Answer 1

The net ionic equation for the given reaction is:

Cu^2+(aq) + S^2-(aq) → CuS(s)

Step-by-step explanation:

The net ionic equation represents the overall chemical reaction in solution by excluding spectator ions (ions that appear unchanged on both sides of the equation). In this reaction:

CuSO4(aq) + K2S(aq) → CuS(s) + K2SO4(aq)

The complete ionic equation would be:

Cu^2+(aq) + SO4^2-(aq) + 2K^+(aq) + S^2-(aq) → CuS(s) + 2K^+(aq) + SO4^2-(aq)

By canceling out the spectator ions (K^+ and SO4^2- ions) present on both sides of the equation, we get the net ionic equation:

Cu^2+(aq) + S^2-(aq) → CuS(s)

This equation shows the essential reaction occurring in the solution where copper ions combine with sulfide ions to form solid copper sulfide.