Question

when Deepak put an iron nail in copper sulphate solution its colour changes to green this is due to the formation of which substance​

Answer 1

➠2)The colour of the solution changes as Fe is more reactive than Cu hence displaces Cu from its aqueous solution of CuSO4 and and forms FeSO4 . Therefore blue colour of CuSO4 solution fades and solution becomes green due to the formation of FeSO4. Cu is deposited on the iron nails at the bottom of the beaker

Answer 2

The colour changes to green due to the formation of ferrous sulfate solution.

Explanation:

• During this reaction, the iron nail gets a brownish coating and the solution turns green.
• The nail has a coating of Copper on its surface and the solution is detected to have the presence of an iron-containing compound, called Ferrous sulphate.

                     $Fe(s)\;+\;CuSO_4(aq)\;\rightarrow\;Cu(s)\;+\;FeSO_4(aq)$                  

• This reaction infers 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 sulfate solution is formed.