Consider this equilibrium constant expression:

Chemistry

2 answers:

My name is Ann [436]4 years ago

5 0

D is the right one

and thats all folks hope this help

alex41 [277]4 years ago

3 0

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–

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