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  • p-Nitrobenzoic acid has lower  value than benzoic acid. Why?       <div s

p-Nitrobenzoic acid has lower pk_{a} value than benzoic acid. Why?

 

 

 

 
 
 
 
 

Answers (1)

Nitro group being electron donating generates electron deficiency at para position and hence stabilizes benzoate ion formed on donation of proton by benzoic acid. Hence, p-nitrobenzoic acid more acidic than benzoic acid and thus, the pk_{a} of p-nitrobenzoic acid is lower than that of benzoic acid.

Posted by

Sumit Saini

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