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Aug 18, 2019 at 8:36 comment added Poutnik Well, if silver can form hydrogen during dissolving in a cyanide solution ( gold needs oxygen, silver does not ), it could as well form hydrogen from $\ce{H2S}$. Just thought. $$\ce{2 Ag + 4 CN- + 2 H2O -> H2 + 2 [Ag(CN)2]- + 2 OH-}$$
Jul 23, 2018 at 14:40 history edited Martin - マーチン CC BY-SA 4.0
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Jul 23, 2018 at 14:40
Jul 23, 2018 at 13:31 history answered Winston Cahya CC BY-SA 4.0