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Dissociation of H2S is suppressed in acidic medium.Explain

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Dissociation of H2S is suppressed in acidic medium.Explain

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Only Cu2+ and Pb2+ are precipitated as CuS and PbS respectively. These are the metal sulphides of group II. The Ks of these metal sulphides is small. Due to common ion (H+) effect, the dissociation of wealth acid H2S is suppressed.

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