In the reaction $\text{CH}_3\text{COOH} + \text{H}_2\text{O} \rightleftharpoons \text{CH}_3\text{COO}^- + \text{H}_3\text{O}^+$, what does the acetate ion ($ ext{CH}_3\text{COO}^-$) represent?
Answer
The conjugate base of acetic acid.
When acetic acid ($ ext{CH}_3\text{COOH}$) donates its proton, the resulting ion ($ ext{CH}_3\text{COO}^-$) is defined as its conjugate base. This is intrinsic to the Brønsted-Lowry concept of conjugate pairs.
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