Question

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

Answer 1

Hello there,

Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound.

equation - Zn+2HCl⟶ZnCl2+H2

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Double displacement reaction A type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products is called double displacement reactions.

equation - MgCl2 +2KOH⟶Mg(OH)2 +2KCl

HOPE THIS HELPS

THANKS

Answer 2

Answer:

Displacement Reactions :-

• In a displacement reaction, a highly active metal displaces a less active metal from it's compound.
• One chemical species is displaced.
• Occur based on the reactivity of the metals involved.

A + BC $\rightarrow$ AC + B

where A is more reactive than B

For Example

Zn + HCl $\rightarrow$ ZnCl$_2$ + H

(since Zn is more reactive than H)

Na + H₂O $\rightarrow$ NaOH +H₂

(Na replaces H+ from H₂O çause Na is more reactive than H+)

Double Displacement Reaction :-

• A double displacement reaction involves the exchange of two ionic species between two different molecules.
• Two chemical species are displaced.
• Occurs where exchangeable ions are included in compounds.

AB + CD $\rightarrow$ AD + CB

For Example

Li₂SO₄ + BaCl₂ $\rightarrow$ BaSO₄ + 2LiCl

NaOH + HCl $\rightarrow$ NaCl + H₂O

[In the attachment are the reactions written in bold

Explosive is the reaction of Na with H2O (explosive because Na is highly reactive)]

                                   

Hope this helps!