Chemistry, asked by Vishalnayyer, 1 year ago

a student has been collecting silver coins and copper coins. one Day he observed a black coating on Silver coins and green coating on Cooper coins. which chemical phenomena is responsible for these coatings, write the chemical name of black and green coating.

Answers

Answered by puspalatasahoop2ta4c

The chemical phenomena responsible is oxidisation

Vishalnayyer: also Write chemical name

Vishalnayyer: plz

puspalatasahoop2ta4c: 4Cu+ 02 --------> 2Cu20 (copper)

puspalatasahoop2ta4c: 2Ag + O2 = Ag2O

puspalatasahoop2ta4c: this one is of silver

Vishalnayyer: thanks à lot

Answered by yoyopaaji12

Answer:1) oxidation

2) green coating---> 2Cu + O2 -> 2CuO

black coating----> 2Ag + O2-> 2AgO2

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