Question

when a strip of zinc meatal is put in cuSo4 solution, the blue colour of cuSo4 solution fades gradually why?

Answer 1

When Zinc Strip Is Dipped In Copper Sulphate Solution Zinc Sulphate Is Formed And Copper Is Deposited On Zinc Strip

Zn(s) + CuSO4(aq)---------> ZnSO4(aq) + Cu(s)
(Silver Whitish) (Blue)
(Colorless) (Reddish Brown)

Answer 2

Hey !!!!!!

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According to The Activity Series,

Zn is more reactive than copper.....

Hence, When a Zinc Metal is dropped into a Solution having Copper, Zinc Metal Displaces Copper....

In This Case, Reaction formed is:

Zn(s)+CuSO4(aq.) ------>  ZnSO4(aq.) + Cu(s)

Here, CuSO4 is Blue in color, 

But, ZnSO4 is Colorless 

And, Copper is Being Deposited in Brown color at bottom

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Thanks Mate....!!!

Hope This Helps...!!!   ^_^