A small piece of a metal M is dipped in a 10ml solution of blue copper sulphate. It is observed that the solution turns green and a brown deposit is formed (a) why does the blue colour of the copper sulphate solution disappear
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Answer:
When zinc metal is added to a solution of copper sulphate (CuSO
4
), the blue colour of the latter changes to colourless as zinc sulphate (ZnSO
4
) is formed.
In this displacement reaction, zinc being more active metal than copper displaces it to form zinc sulphate, as shown below:
Zn(s)+CuSO
4
(aq)→ZnSO
4
(aq)+Cu(s)
(blue) (colourless)
Explanation:
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