Consider this equilibrium constant expression: what does this expression represent? a. kb for h2s b. ka for h2s c. kb for s2– d. kb for hs– e. ka for hs–

The answer would be: D. Kb for HS–

Kb is the dissociation constant of an acid/base molecule. The word b in Kb is base, which means the formula should have an OH- ion inside it. Ka would be the opposite of Kb where the formula has H+ ion.
In this question, the formula is: [H2S][OH-]/ [HS-]
Since there are OH- ion. Since H2S is acid and HS- is base, I think it should be Kb for HS–

A. it acts on all objects all the time. mark as brainliesg