Question

you must have seen tarnished copper vessels being cleaned with lemon or tamarind juice .Explain why these so substances are effective in cleaning the vessels​

Answer 1

In tarnished copper vessel there is layer formed due to corrosion which is basic in nature which is dissolved in the lemon or tamarind juice which are acidic in nature.

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Answer 2

You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.

When copper vessels are exposed to moist air, a green coating of basic copper carbonate is formed.

2Cu + Co2 + O2 + H2O ---> CuCo3.Cu (OH)2

As we know, Sour substance contain acid.

Lemon juice contain citric acids & Tamarind juice contain tartaric acid. This acid dissolve the green coating of basic copper carbonate & restore the characteristic to the copper vessels.