The reaction in which two compounds exchange their ions to form two new compounds is called:
- a displacement reaction
- a decomposition reaction
- an isomerization reaction
- a metathesis reaction
A Metathesis Reaction is actually a Double Displacement Reaction.
So, the reaction in which two compounds exchange ions is a Double Displacement Reaction.
FeSO 4 +CuCl 2 ⟶FeCl 2 +CuSO 4