Question

Which of the following salts will give an aqueous solution having pH of almost 7?

Options

• NH₄NO₃

• NH₄Cl

• CaCl₂

• KCl

Answer 1

KCl

Explanation:

KCl is a neutral salt formed from a strong acid (HCl) and a strong base (KOH). When dissolved in water, it completely dissociates into K⁺ and Cl⁻ ions. Since these ions do not react with water (do not undergo hydrolysis), the natural balance of H⁺ and OH⁻ ions in water remains undisturbed. This is why an aqueous solution of KCl shows a pH of exactly 7.