What would happen if an Iron blade is dropped in a solution of Blue vitriol?

• 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)