Question

Steps taken for performing the reaction between copper sulphate and iron are:

(i)prepare copper sulphate solution by dissolving a few crystals of copper sulphate in water.
(ii) put some iron nails in it.

(iii)leave it for five minutes.

(iv)observe the change in the colour of the solution

(v)take out the iron nails and observe for any deposit on it.

The result of the above experiment is not as expected. Identify the step that has been missed out.

a
heat copper sulphate solution before putting iron nails.

b
cool copper sulphate solution before putting iron nails.

c
rub the iron nails with sand paper.

d
close the test tube with a cork.​

Answer 1

Answer:

Rub iron nails with sand paper

Because iron nails get rust(Fe3O4.xH2O)