Double Displacement Reaction
Double Displacement Reaction is a reaction in which two compounds exchange their elements which results in the formation of two new compounds. In this reaction, a precipitate is formed when the cations from one of the reactants react with the anion of the other reactant.
The general form of a double-displacement reaction is illustrated as:
AB + CD → AD + CB
Double Displacement Reaction Definition
The chemical reaction in which ions are exchanged between two compounds and two new compounds are formed is called Double Displacement Reaction.
Since two displacements take place in this reaction, hence it is called double displacement reaction. It is also known as Double Replacement Reaction or Salt Metathesis Reaction.
A double displacement reaction can be represented as follows:
Double Displacement Reactions Example
When barium chloride solution is mixed with sodium sulphate solution, barium sulphate and sodium chloride are formed. This reaction is as follow:
Na2SO4 + BaCl2 → BaSO4 + 2NaCl
In this reaction, sulphate and chloride ions are exchanged between sodium sulphate and barium chloride, due to which barium sulphate and sodium chloride are formed. This reaction results in the formation of a white precipitate of barium sulphate.
Below are the few more examples of double displacement reaction:
- AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)
- HCl (aq) + KOH (aq) → KCl (aq) + H2O (l)
Displacement Reaction
Displacement Reaction, also known as single replacement reaction, is a chemical reaction in which one element displaces another element in a compound. In this reaction, the less reactive element is replaced by a more reactive element or metal which results in the formation of a new substance.
In this article, we will discuss displacement reactions, single displacement reactions, and double displacement reactions along with their examples.
Table of Content
- What is a Displacement Reaction?
- Examples of Displacement Reaction
- Reactivity Series
- Types of Displacement Reaction
- Single Displacement Reaction
- Double Displacement Reaction