Shami bought a new flower vase made of copper. After a few months, he found that the vase has lost its lustre and there was a greenish deposit on its surface.
a) What are the compounds present in that greenish deposit?
b) Write necessary chemical reaction taking place in this case.
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Answer:
a) It a mixture of CuCO3 and Cu(OH)2
b) Cu 2+ + CO3 2- = CuCO3
Cu 2+ + OH- = Cu(OH)2
Explanation:
a) these compound are formed as the copper undergoes corrosion
b) 2+ is the valency of cuprous and not cupric
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