Question

Calculate the valency of copper in copper sulphide Cu2 S and also in copper

oxide Cu O​

Answer 1

Answer:

CuCl2=0   [Overall charge is neutral]

⇒2×x+2×(−1)=0   [x=valency of copper and (-1) charge of chlorine]

⇒2x+(−2)=0

⇒2x=+2

∴x=22=1

Hence, valency of Cu in cuprous chloride is 1.

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Answer 2

Answer:

In Cu2S, it is 1 and in CuO, it is 2.

Explanation:

Cu2S :-

2x-2=0

2x=2

x=2/2=1

CuO:-

x-2=0

x=2