Inorganic Chemistry

Removing Tarnish from Silver

Silver tarnishes in air to form a black coating of silver sulphide, which has the formula Ag2S. The chemical equation for the formation of silver tarnish following reaction with hydrogen sulphide (H2S) is as follows: 2 Ag(s) + H2S(g) → Ag2S(s) + H2(g) There’s speculation that, in the present day, tarnishing of silver actually occurs more quickly due […]