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shine (262)

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Olaaa!! Perrrfect answer. 44  [65 rates]

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though benzoic acid is more acidic than all other carboxylic acids bcoz.......
the carboxylate ion whr there is destabilisation due to the electron donating alkyl groups...(thus increasing -ve charge on the oxygen of the carboxylate ion.....nd decresing acidity) is less stable than carboxylic acid
however in case of the formic acid the alkyl gp is actually -H which has no destabilsing factor for formate ion
nd hence formate ion is highly stabilised as compared to formic acid .
whereas benzoic acid is itself resonance stabilised thus benzoate ion is ot very stable compared to benzoic acid
hence we conclude
formic acid is more acidic than benzoic acid

i hope thts clear



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