• Blue vitriol is another name for Copper Sulphate solution.
  • When an Iron nail/blade is dropped into the Copper Sulphate solution, the solution will change its colour to green .
  • The now-green solution is called Iron Sulphate .
  • The copper will get deposited on the iron nail/blade in a red-brown coating .
  • This process is an example of chemical change .
  • It is irreversible .

Reaction of Copper sulphate with iron

Copper sulphate solution (blue) + Iron → Iron sulphate solution (green) + Copper (brown deposit)

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo