Which ion is produced by acids in solution?

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Multiple Choice

Which ion is produced by acids in solution?

Explanation:
Acids in water release hydrogen ions, which in solution exist mainly as hydronium ions (H3O+). This rise in H+ concentration is what characterizes an acidic solution, so the ion produced by acids is the hydrogen ion. The other ions listed aren’t the defining product of acid dissolution: OH− comes from bases, while Na+ and Cl− are common counterions that can appear with many salts, not the species that indicates acidity. For example, HCl dissociates to H+ (or H3O+) and Cl−, showing the key role of the hydrogen ion in acidity.

Acids in water release hydrogen ions, which in solution exist mainly as hydronium ions (H3O+). This rise in H+ concentration is what characterizes an acidic solution, so the ion produced by acids is the hydrogen ion. The other ions listed aren’t the defining product of acid dissolution: OH− comes from bases, while Na+ and Cl− are common counterions that can appear with many salts, not the species that indicates acidity. For example, HCl dissociates to H+ (or H3O+) and Cl−, showing the key role of the hydrogen ion in acidity.

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