[tex]2\text{ H}_2\text{O}_{2(\text{l})}\text{ }\rightarrow\text{ 2 H}_2\text{O}_{(\text{l\rparen}}\text{ + O}_{2(g)\text{ }}\text{ Descomposition}[/tex][tex]\text{ K}_2\text{SO}_{4(aq)\text{ }}\text{ + Ba\lparen NO}_3{)}_{2(aq)}\text{ }\rightarrow\text{ 2KNO}_{3(aq)}\text{ + BaSO}_{4(s)\text{ }}\text{ Metathesis}[/tex][tex]\text{ PbCl}_{2(aq)}\text{ + FeSO}_{4(aq)}\text{ }\rightarrow\text{ FeCl}_{2(aq)}\text{ + PbSO}_{4(s)\text{ }}\text{ Metathesis}[/tex]
A decomposition reaction is a chemical reaction in which one reactant breaks down into two or more products.
A metathesis reaction is a chemical reaction in which the positive ions and negative ions present in the reactants appear to exchange partners.
