Question

What is the difference between displacement and double displacement reactions? Write equations for these reactions.

Answer 1

The answer to this question is based on the basic reaction in organic chemistry that includes the fact that displacement in chemistry means one element is substituted for another and in double displacement as the name says, two ionic compounds are exchanged.

Complete step by step answer:
We have come across several types of reactions in the organic chemistry part that are additional reactions, substitution reactions and also elimination reactions and so on other reactions too along with many named reactions.
Now we shall see what displacement and double displacement reactions are.
- To know the differences, we shall make a table which helps us to easily understand or easily differentiate with comparison. The table is shown below,

Displacement reaction	Double displacement reaction
It is a chemical reaction in which one element is replaced by another in a compound.	It is a chemical reaction in which exchange of bonds between the two non reacting chemical species takes place that results in creation of products with similar bonding affiliations.
This reaction is a slow reaction	This reaction is fast reaction
This reaction involves change in the colour of product where there is no formation of precipitate	This reaction involves the formation of a precipitate formation with or without change in colour
Example of reaction for this type of reaction is$Fe+CuS{{O}_{4}}\xrightarrow{{}}FeS{{O}_{4}}+Cu$ In this reaction there is replacement of iron by copper and new compound is formed	Example for this reaction is,$MgC{{l}_{2}}+2KOH\xrightarrow{{}}Mg{{(OH)}_{2}}+2KCl$ In this reaction chloride ions are displaced by hydroxide ions and vice versa

Note: The double displacement reaction is also known by the name salt metathesis reaction and displacement reaction is also known by the name single – displacement reaction and in this displacement reaction more active metal displaces less active metals whereas in double displacement reaction the ions are exchanged between reactants.