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Which ion concentration *increases* when an acid dissolves in water?

Ahydrogen ion (H⁺)
Bhydroxide ion (OH⁻)
Cchloride ion (Cl⁻)
Dsodium ion (Na⁺)
Answer & Solution
Correct answer: A. hydrogen ion (H⁺)
Acids dissolve in water to release H⁺ ions. More H⁺ → lower pH → more acidic.
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