Chemistry, asked by mariyah67, 11 months ago

a boy collects silver as well as copper coins. one day he founds a black coating on silver coins. mention chemical phenomena responsible for black and green coatings . write chemical names for these coatings

Answers

Answered by abhishek2057

Hey mate..
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The answer to your question is:--

Black coating on silver coins is due to silver sulphide(Ag2s).

2 Ag(s) + H2S(g) ----- Ag2S(s) + H2(g).

Green Coating on copper coins is due to copper carbonate and copper hydroxide.

2 Cu + H2O + CO2 + O2 ------ > Cu(OH)2 + CuCO3

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abhishek2057: Black coating on silver coins is due to silver sulphide(Ag2s).

2 Ag(s) + H2S(g) ----- Ag2S(s) + H2(g).

Green Coating on copper coins is due to copper carbonate and copper hydroxide.

2 Cu + H2O + CO2 + O2 ------ > Cu(OH)2 + CuCO3

Hope this helps.

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