Question

iron nail is placed in copper sulphate solution the colour of solution changes due to formation of

(a) copper
(b) iron sulphate
(c) Copper sulphate
(d) iron

Answer 1

Explanation:

Iron nails dissolve completely

Fe(s)+CuSO

4

⟶Cu(s)+FeSO

4

When an 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. This reaction shows that iron is more reactive than copper as it displaces copper from its solution and iron passes into solution as Fe

2+

ions and ferrous sulphate solution is formed.

Answer 2

Answer:

When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.

Explanation:

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed in the surface of iron and the colour of copper sulphate solution changes from blue to pale green. The reaction shows that iron is more reactive than copper because it displaces copper from the copper sulphate solution. The iron passes into the solution as Fe (II) forming the ferrous sulphate solution.