Chemistry

Question

H3BO3(aq) + HS-(aq) H2BO3-(aq) + H2S(aq) What is the sequence of Brønsted-Lowry acids and bases?

2 Answer

  • acid + base base + acid
  • Answer : The correct sequence is,

    [tex]\text{Acid}+\text{Base}\rightleftharpoons \text{Conjugate Base}+\text{Conjugate Acid}[/tex]

    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 given equilibrium reaction will be,

    [tex]H_3BO_3(aq)+HS^-(aq)\rightleftharpoons H_2BO_3^-(aq)+H_2S(aq)[/tex]

    In this reaction, [tex]H_3BO_3[/tex] is an acid that donate a proton or hydrogen to [tex]HS^-[/tex] base and it forms [tex]H_2BO_3^-[/tex] and [tex]H_2S[/tex] are conjugate base and acid respectively.

    That means, [tex]H_3BO_3[/tex] and [tex]HS^-[/tex] are acid and base and [tex]H_2BO_3^-[/tex] and [tex]H_2S[/tex] are conjugate base and acid respectively.

    The general sequence of Brønsted-Lowry acids and bases is:

    [tex]\text{Acid}+\text{Base}\rightleftharpoons \text{Conjugate Base}+\text{Conjugate Acid}[/tex]

    Hence, the correct sequence is,

    [tex]\text{Acid}+\text{Base}\rightleftharpoons \text{Conjugate Base}+\text{Conjugate Acid}[/tex]

NEWS TODAY