Which substance is an Arrhenius acid?

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Multiple Choice

Which substance is an Arrhenius acid?

Explanation:
Arrhenius acids release hydrogen ions (H+) into aqueous solution, increasing the hydronium (H3O+) concentration. Hydrogen iodide does exactly that: when HI dissolves in water, it dissociates into H+ and I-, boosting the hydronium level and behaving as an Arrhenius acid. The other substances either produce hydroxide (OH−) in solution, making them Arrhenius bases, or in the case of ammonia, act as a base by accepting protons rather than donating them. So HI is the Arrhenius acid here.

Arrhenius acids release hydrogen ions (H+) into aqueous solution, increasing the hydronium (H3O+) concentration. Hydrogen iodide does exactly that: when HI dissolves in water, it dissociates into H+ and I-, boosting the hydronium level and behaving as an Arrhenius acid. The other substances either produce hydroxide (OH−) in solution, making them Arrhenius bases, or in the case of ammonia, act as a base by accepting protons rather than donating them. So HI is the Arrhenius acid here.

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