What happened when iron nail are placed in copper sulphate solution ? write word equations of all the reaction taking place in this process .
The process in which a highly reactive metal displaces a less reactive metal in its aqueous solution is called displacement reaction.
When an iron nail is placed in copper sulphate solution, it undergoes the process of displacement reaction.
Iron is more reactive than copper.So it displaces the Copper from the copper sulphate solution and converts it into ferrous sulphate solution. Iron nails lose their shiny appearance because an insoluble layer of copper is formed on the nails, Meanwhile, the solution, copper sulphate loses its blue colour because of the formation of ferrous sulphate.
Iron +copper sulphate solution ⟶ Ferrous sulphate solution + copper.
Fe+CuSO4⟶FeSO4+Cu