The `K_(sp)` values of two slightly soluble salts AB and `PQ_2` are each equal to `4.0xx10^(-18)`.Which salt is more soluble ?

Explanation

To determine which salt is more soluble between AB and PQ₂, both of which have the same solubility product constant (Ksp) of \(4.0 \times 10^{-18}\), we need to analyze their dissociation and solubility.

### Step-by-Step Solution:

1. **Dissociation of Salt AB**:
- When salt AB dissolves, it dissociates into its ions:
\[
AB \rightleftharpoons A^+ + B^-
...