A) \[K=\frac{[HA][{{H}_{2}}O]}{[{{H}_{3}}{{O}^{+}}][\overline{A}]}\]
B) \[K=\frac{[{{H}_{3}}{{O}^{+}}][\overline{A}]}{[HA][{{H}_{2}}O]}\]
C) \[K=\frac{[{{H}_{3}}{{O}^{+}}][{{H}_{2}}O]}{[\overline{A}][HA]}\]
D) \[K=\frac{[HA][\overline{A}]}{[{{H}_{2}}O][{{H}_{3}}{{O}^{+}}]}\]
Correct Answer: B
Solution :
\[HA+{{H}_{2}}O{{H}_{3}}{{O}^{+}}+{{A}^{-}}\]\[K=\frac{[{{H}_{3}}{{O}^{+}}][{{A}^{-}}]}{[HA][{{H}_{2}}O]}\]
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