Answer : The correct options are:
(a) H₂S/HS⁻
(b) H₃PO₄/KH₂PO₄
(d) CH₃CO₂H/NaCH₃CO₂
Explanation :
According to the Bronsted Lowry concept, Bronsted Lowry-acid is a substance that donates one or more hydrogen ion in a reaction and Bronsted Lowry-base is a substance that accepts one or more hydrogen ion in a reaction.
Or we can say that, conjugate acid is proton donor and conjugate base is proton acceptor.
The general equilibrium reaction will be,
[tex]HA+B\rightleftharpoons BH^++A^-[/tex]
In this reaction, [tex]HA[/tex] is an acid that donate a proton or hydrogen to [tex]B[/tex] base and it forms [tex]A^-[/tex] and [tex]BH^+[/tex] are conjugate base and acid respectively.
That means, [tex]HA[/tex] and [tex]A^-[/tex] are conjugate acid base pair and [tex]B[/tex] and [tex]BH^+[/tex] are conjugate base acid pair.
(a) H₂S/HS⁻
This pair of compound represent a conjugate acid base pair.
(b) H₃PO₄/KH₂PO₄
This pair of compound represent a conjugate acid base pair.
(c) Ca(OH)₂/CaSO₄
This pair of compound does not represent a conjugate acid base pair because Ca(OH)₂ is strong base, it can accept a proton from conjugate acid.
(d) CH₃CO₂H/NaCH₃CO₂
This pair of compound represent a conjugate acid base pair.
