Question

1. Put two to three iron nails in the blue solution of copper sulphate and after 15 to 20
minutes the colour of the solution turns green.
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Answer 1

Answer:

When iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.

Explanation:

s, which says that Iron is more reactive than copper, therefore it can displace copper from its salts (here,copper sulphate).

The displacement reaction taking place can e written as :

Fe + CuSO4(aq) == FeSO4 + Cu

Iron + Copper Sulphate(aq) == Iron sulphate + copper

Now, enough basics, directly to question…

A after 30 minutes:

1) The initial blue colour of copper sulphate solution is changed to light green colour of iron sulphate.

Answer 2

Answer:

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