Which of the following concerning electrolytes and the solubility rules is/are true? 1. The solubility rules apply only to ionic substances. 2. All soluble ionic compounds are considered strong electrolytes. 3. The solubility rules apply to aqueous and non-aqueous solutions.

1. is true

Explanation:

The solubility rules apply only to salts, which are ionic compounds.

2. is false. A strong electrolyte is a salt that dissociates completely in solution. Not all salts dissociate completely. For example, a 0.36 mol·L⁻¹ solution dissociates as:

K₂SO₄ ⟶ K⁺ + KSO₄⁻ (30 %) + SO₄²⁻

Thus, K₂SO₄ does not dissociate completely into K⁺ and SO₄²⁻ ions.

3. is false. The solubility rules apply only to aqueous solutions.