Why a tarnished copper vessel regains its shine when rubbed with lemon?
Answers
Lemon is acidic. Thus, on rubbing the tarnished copper vessel with lemon, the basic copper oxide or copper carbonate reacts with the acid (citric acid) present in the lemon to form a salt which is washed away with water.
Hope it is helpful.
Due to neutralization reaction the tarnished copper vessel regains its shine when rubbed with lemon.
Explanation:
Tarnished copper means an oxide layer is formed on the surface of copper metal. This also means that copper oxide is formed and it is basic in nature. But when we rub this copper oxide with lemon (acidic in nature) then a neutralization reaction takes place.
As an acid on reaction with a base leads to the formation of salt and water. Hence, due to this neutralization reaction the tarnished copper vessel regains its shine when rubbed with lemon.
Learn more about neutralization reaction:
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