Which of the following is the strongest base?

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(D) The strength of a base is inversely proportional to the strength of its conjugate acid. $1$. $CH_{3}COO^{-}$ has conjugate acid $CH_{3}COOH$ $(pK_

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$CH_{3}O^{-}$

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(D) The strength of a base is inversely proportional to the strength of its conjugate acid. $1$. $CH_{3}COO^{-}$ has conjugate acid $CH_{3}COOH$ $(pK_{a} \approx 4.75)$. $2$. $Cl^{-}$ has conjugate acid $HCl$ $(pK_{a} \approx -7)$. $3$. $OH^{-}$ has conjugate acid $H_{2}O$ $(pK_{a} \approx 15.7)$. $4$. $CH_{3}O^{-}$ has conjugate acid $CH_{3}OH$ $(pK_{a} \approx 15.5)$. Comparing the $pK_{a}$ values,$CH_{3}OH$ is the weakest acid among the given options. Therefore,its conjugate base,$CH_{3}O^{-}$,is the strongest base.

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