A Chemical Reaction Occurs:
* Displacement Reaction: Iron is more reactive than copper. This means iron has a stronger tendency to lose electrons and form positive ions.
* Redox Reaction: The iron nail will displace the copper ions from the copper sulphate solution. This is a type of redox reaction where:
* Iron (Fe) is oxidized: It loses electrons and forms iron(II) ions (Fe²⁺).
* Copper (Cu²⁺) is reduced: It gains electrons and forms copper metal (Cu).
Observable Changes:
* The iron nail becomes coated with copper: You'll see a reddish-brown coating forming on the surface of the nail.
* The blue copper sulphate solution turns pale green: This is due to the formation of iron(II) sulphate (FeSO₄) in the solution, which has a pale green color.
* The solution may heat up slightly: This indicates that the reaction is exothermic (releases heat).
Chemical Equation:
The overall chemical reaction can be represented by the following equation:
Fe(s) + CuSO₄(aq) → FeSO₄(aq) + Cu(s)
In Summary:
When an iron nail is dipped in a copper sulphate solution, the iron displaces the copper from the solution, resulting in the formation of a copper coating on the nail, a change in the solution's color, and a slight increase in temperature.
