How would you find the amount of hydrogen sulfide though a precipitate?

If I am trying to determine the exact volume of hydrogen sulfide gas in a closed container though means of precipitation, obviously I should draw a sample of the gas mixture, but with what chemical should I react the hydrogen sulfide with to produce a precipitate that can be gravimetrically analyzed?

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  • 1 decade ago
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    Mercuric acetate, Hg(C2H3O2)2(aq) + H2S(g) ===> HgS(s) + 2HC2H3O2(aq). HgS is one of the most water insoluble substances known. The Ksp is about 10^-50.

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