1.

What is the difference between displacement and double displacement reactions?

Answer»

The difference between displacement reaction double displacement reaction are as follows.

Displacement reactionDouble displacement reaction
In a displacement reaction, a more reactive element replaces a less reactive element from a compound.In a double displacement reaction, two atoms or a group of atoms switch places form new compounds.
The reaction in which an element displaces another element from a substance is called “displacement reaction.The reaction in which the constituent atoms of the reaction interchange by the decomposition of the two reactants, to produce new compounds are called double displacement reactions.
In a displacement reaction, one displacement takes place.

A + BX → AX + B

In a double displacement reaction, two displacements take place to complete the reaction.

AB + CD → AC + BD

Metals react with the salt solution of another metal.Salt solutions of two different metals react with each other.
Examples:

2KI + Cl2 → 2KCl + I2 is a displacement reaction.

CuSO4 + Zn → ZnSO4 + Cu is also a displacement reaction.

Examples: 
MgCl2 + 2KOH → Mg(OH)2 + 2KCl
HCl + NaOH → NaCl + H2O
A single-replacement reaction is a chemical reaction in which one element is substituted for another element in a compound, generating a new element and a new compound as products.

For example,

2HCl(aq)+Zn(s)→ZnCl2​(aq)+H2​(g) is an example of a single-replacement reaction. The hydrogen atoms in HCl are replaced by Zn atoms, and in the process a new element hydrogen is formed.

A double-displacement reaction occurs when parts of two ionic compounds are exchanged, making two new compounds. A characteristic of a double-replacement equation is that there are two compounds as reactants and two different compounds as products.

An example is CuCl2​(aq)+2AgNO3​(aq)→Cu(NO3​)2​(aq)+2AgCl(s)

There are two equivalent ways of considering a double-replacement equation,either the cations are swapped, or the anions are swapped.


Discussion

No Comment Found

Related InterviewSolutions