Which ion is produced by acids in solution?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

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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