Question
Write a note about acidity of carboxylic acids.
✓
Answer
1. Carboxylic acids undergo ionisation to produce W and carboxylate ions in aqueous solution. The carboxylate ion is stabilised by resonance which make the Carboxylic acid to donate the proton easily.
2. The resonance structure of carboxylate ion are given below.
3. The strength of carboxylic acid can be expressed in terms of the dissociation constant($K_a$):
The stronger the acid, the large will be its $K_a$ value.
$P K_a=-\log K_a$
A strong acid will have higher $k_a$ value but smaller $pK ^{ a }$ value, the reverse is true for weak acid.
2. The resonance structure of carboxylate ion are given below.
3. The strength of carboxylic acid can be expressed in terms of the dissociation constant($K_a$):
The stronger the acid, the large will be its $K_a$ value.
$P K_a=-\log K_a$
A strong acid will have higher $k_a$ value but smaller $pK ^{ a }$ value, the reverse is true for weak acid.
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