I read that silver in the presence of hydrogen sulfide corrodes to form silver sulfide and hydrogen.

$$\ce{Ag + H2S -> Ag2S + H2}$$

But in the reactivity series silver is placed much below hydrogen.

So, how is this displacement reaction taking place at all?


Silver to Black - and Back. JCE

Single Replacement Reactions. Chemistry LibreTexts.

  • 2
    $\begingroup$ Are you aware the reactivity serie applies to hydrated ions ? $\endgroup$
    – Poutnik
    Oct 11, 2020 at 15:45
  • 1
    $\begingroup$ @Poutnik Franky, no. I only know the reactivity series of metals and anions. $\endgroup$
    – Shub
    Oct 11, 2020 at 15:47
  • 4
    $\begingroup$ I don't quite believe this happens. Oxygen is a part of the process too. $\endgroup$ Oct 11, 2020 at 15:51
  • $\begingroup$ @Shub Please note ChemSE uses mhchem to ease writing chemical equations / formulae. It functions well in questions, answers, comments; but because it is something special, you should not use it to format the title of a question. Its scope is described on mhchem.github.io/MathJax-mhchem. $\endgroup$
    – Buttonwood
    Oct 11, 2020 at 16:29


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