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Brief question: In $\ce{Cu}$-$\ce{As}$ group analysis we are expected to add thinoacetamide to make a precipitate with sulfide. Can we use $\ce{H2S}$ instead?

Cu-As Group

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    $\begingroup$ For safety reasons. Older generations of chemists who studied in 70s-90s will remember the stench of rotten eggs of the gas. $\endgroup$
    – AChem
    Jun 2, 2020 at 0:10
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    $\begingroup$ Please do not insert vertical pictures, which are hard to read. Put them in horizontal position. $\endgroup$ Jun 2, 2020 at 7:12
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    $\begingroup$ Go and look up how toxic H2S is. $\endgroup$
    – Waylander
    Jun 2, 2020 at 7:55
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    $\begingroup$ @Mithoron, Still better than using Kipp's apparatus. Have you ever used one? $\endgroup$
    – AChem
    Jun 3, 2020 at 0:22
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    $\begingroup$ @Mithoron, So you don't belong to that club when qualitative inorganic analysis had all this stuff. Mercury is a no-no, so is Kipp's apparatus. $\endgroup$
    – AChem
    Jun 3, 2020 at 0:29

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