Question

CuSo4 + Fe -----> Cu + FeSo4.
In the above reaction 50 gm of iron is added to 1 liter of copper sulfate solution. If the weight of Cu precipitated are 25 gm, find the approximate weight of unreacted iron.?

Answer 1

Iron displaces copper from the sulphate solution leading to formation of ferrous sulphate and copper.

CuSO4 + Fe ----> FeSO4 + Cu

The blue colour of the solution changes to pale green and there is a reddish-brown deposit of copper.

This is a displacement reaction in which a more reactive metal displaces a less reactive metal from its salt solution.