what is the chemical formula for corrosion in copper and silver??
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Answered by
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When copper or silver combines with oxygen, the process is known as corrosion or oxidation.
When copper reacts with oxygen, then it produces copper oxide. The chemical equation of this reaction is 4Cu + O2 = 2Cu2O, and forms Copper Oxide.
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.
When copper reacts with oxygen, then it produces copper oxide. The chemical equation of this reaction is 4Cu + O2 = 2Cu2O, and forms Copper Oxide.
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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Copper Corrosion:
When copper is exposed to air for a longer time , then copper reacts with Carbon Dioxide and water of air to form a green coating of basic copper carbonate on the surface of the object.The formation of this green coating on the surface of a copper object corrodes it.
Green coating of basic copper carbonate is a mixture of copper carbonate and copper hydroxide , CuCO3. Cu (OH)2.
Tarnishing Of Silver :
The black coatings on silver .
4Ag +2H2S +O2 -----------> 2Ag2S + 2H2O
When copper is exposed to air for a longer time , then copper reacts with Carbon Dioxide and water of air to form a green coating of basic copper carbonate on the surface of the object.The formation of this green coating on the surface of a copper object corrodes it.
Green coating of basic copper carbonate is a mixture of copper carbonate and copper hydroxide , CuCO3. Cu (OH)2.
Tarnishing Of Silver :
The black coatings on silver .
4Ag +2H2S +O2 -----------> 2Ag2S + 2H2O
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