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The following is the structure of citric acid:(i) Determine if the given structure is a carboxylic acid.(ii) Compare the acidic strength of citric acid with lactic acid. Citric acid and lactic acid have pKa values of 3.13 and 3.86, respectively.

The following is the structure of citric acid:

(i) Determine if the given structure is a carboxylic acid.
(ii) Compare the acidic strength of citric acid with lactic acid. Citric acid and lactic acid have pK_a values of 3.13 and 3.86, respectively.