1.

Carboxylic acid decompose into carboxylate ion and H+ ion.1. Explain this on the basis of resonating structure of carboxylic acid.2. Arrange the following in the increasing order of acidity. HCOOH, CH3COOH3. Substantiate.

Answer»

1. Carboxylic acid decomposes to give proton and carboxylate ion and is stabilized by resonance. This explains the acidic character of carboxylic acid.

2. CH3COOH < HCOOH 

3. In acetic acid the electron donating effect (+l – effect) of -CH3 group destabilises the carboxylate anion and decreases the acid strength. Whereas in formic acid the H atom has not electron withdrawing or electron donating effect.



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