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An acidified solution of 0.05 M Zn2+ is saturated with 0.1 M H2S. What is the minimum molar concentration (M) of H+ required to prevent the precipitation of ZnS?Use KSP(ZnS)=1.25×10−22 and overall dissociation constant of H2S.KNET=K1K2=1×10−21

Answer» An acidified solution of 0.05 M Zn2+ is saturated with 0.1 M H2S. What is the minimum molar concentration (M) of H+ required to prevent the precipitation of ZnS?

Use KSP(ZnS)=1.25×1022 and overall dissociation constant of H2S.

KNET=K1K2=1×1021




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