Here's how to break down the ions in potassium perchlorate (KClO₄) dissolved in water:

1. Dissociation:

When potassium perchlorate dissolves in water, it dissociates into its constituent ions:

KClO₄ (s) → K⁺ (aq) + ClO₄⁻ (aq)

2. Ion Ratio:

From the balanced equation, we see that:

* 1 mole of KClO₄ produces 1 mole of K⁺ ions

* 1 mole of KClO₄ produces 1 mole of ClO₄⁻ ions

Conclusion:

Therefore, for every mole of potassium perchlorate dissolved in water, you will have:

* 1 mole of potassium ions (K⁺)

* 1 mole of perchlorate ions (ClO₄⁻)