A silver article generally turns black …

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A silver article generally turns black when kept in the open for a few days. The article rubbed with toothpaste again starts shining. a. Why do silver article turns black when kept in the open for a few days?Name the phenomenon involved. b. Name the black substance formed & give its chemical formula.

Posted by Riya Vishwa#Karma 5 years, 4 months ago

CBSE > Class 10 > Science

3 answers

K Aashiyana 5 years, 4 months ago

A)Silver metals develop a black layer of silver sulphide & reacts with hydrogen sulphide present in thw atmosphere. Ag+H2S=Ag2S+H2 The phenomenon is called corrosion of silver metal.. B) Silver sulphide is that black substace formed... Hope this will help...

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Stranger?♋ Things 5 years, 4 months ago

Ag+ H2S +O2 ------> Ag2S+ H2O

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Stranger?♋ Things 5 years, 4 months ago

Silver objects corrode slowly in the air due to the presence of H2S in the air. The chemical equation of this reaction is 2Ag + O2 = Ag2O.

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CBSE > Class 10 > Science