Which mechanism causes increased acidity when hydrogen sulfide dissolves in water?

💡 Explanation

When hydrogen sulfide dissolves, H₂S donates a proton to water via autoionization governed by Bronsted-Lowry acid-base theory, increasing hydronium ion concentration and thus acidity. Therefore proton donation accounts for increased acidity, rather than electron acceptance, hydride abstraction, or base formation, which don't generate hydronium ions.

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