PQ and RS are two sparingly soluble salts.Their solubility products are equal to 4.0×10^(-18). Which salt is more soluble

In mols/L (M) they have the same solubility if PQ and RS are the respective formulae.

To determine which salt is more soluble, you need to compare their solubility products (Ksp) values. The higher the Ksp value, the more soluble the salt is.

Given that the solubility product of both salts PQ and RS is equal to 4.0×10^(-18), they have the same solubility.

Solubility product (Ksp) is a measure of the maximum amount of solute that can dissolve in a certain amount of solvent. It is determined by multiplying the concentrations of the ions in the saturated solution.

In this case, since the Ksp values are the same, it implies that both salts have an equal level of solubility in the solution.