Match each substance with the correct designation for the equation HSO3- + CH3NH2 <=> SO32- + CH3NH3+ HSO3- CH3NH2 SO32- CH3NH3+ A. conjugate base of HSO3- B. conjugate acid of SO32- C. conjugate acid of CH3NH2 D. conjugate base of CH3NH3+

Respuesta :

Answer:

[tex]HSO_3^-[/tex]: conjugate acid of [tex]SO_3^{2-}[/tex]

[tex]CH_3NH_2[/tex] : conjugate base of [tex]CH_3NH_3^+[/tex]

[tex]SO_3^{2-}[/tex] : conjugate base of [tex]HSO_3^-[/tex]

[tex]CH_3NH_3^+[/tex] : conjugate acid of [tex]CH_3NH_2[/tex]

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

[tex]HSO_3^-+CH_3NH_2\rightleftharpoons SO_3^{2-}+CH_3NH_3^+[/tex]

Here in forward reaction [tex]CH_3NH_2[/tex] is accepting a proton, thus it is considered as a base and after accepting a proton, it forms [tex]CH_3NH_3^+[/tex] which is a conjugate acid.

And [tex]HSO_3^-[/tex]  is losing a proton, thus it is considered as an acid and after loosing a proton, it forms [tex]SO_3^{2-}[/tex] which is a conjugate base.

Similarly in the backward reaction, [tex]CH_3NH_3^+[/tex] is loosing a proton, thus it is considered as a acid and after loosing a proton, it forms [tex]CH_3NH_2[/tex] which is a conjugate base.

And [tex]SO_3^{2-}[/tex]  is accepting a proton, thus it is considered as a base and after accepting a proton, it forms [tex]HSO_3^{-}[/tex] which is a conjugate acid.