[Maureen]

I need help determining the size of Kc ? please explain too!!?


Consider the reaction shown. Using your knowledge of relative acid-base strengths and equilibrium, determine what you can about the size of Kc for the reaction.

H2SeO3(aq) + HSO3-(aq) <=> HSeO3-(aq) + H2SO3(aq)



why is Kc <1 ? how do you know that?

[savy2020]

As you go down a group, the acidic strength of oxyacids decreases. So that means H₂SeO₃ is weaker than H₂SO₄. Thus the above reaction as written is non-spontaneous (The reverse reaction is spontaneous).
 :delta:(G⁰_rxn)> 0
So from relation between K_c and  :delta:(G⁰_rxn) you get K_c<1