The pK_a values in H_2O of picric acid,acetic | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The acidity of a compound is inversely proportional to its $pK_a$ value.Picric acid ($2,4,6$-trinitrophenol) is a very strong acid due to the stro

Vedclass · Accepted Answer

Picric acid $0.4$,acetic acid $4.75$,phenol $10.0$

Vedclass · Answer

(A) The acidity of a compound is inversely proportional to its $pK_a$ value.Picric acid ($2,4,6$-trinitrophenol) is a very strong acid due to the strong electron-withdrawing effect of three $-NO_2$ groups,which stabilizes the phenoxide ion,resulting in a low $pK_a$ of approximately $0.4$.Acetic acid is a moderately strong organic acid with a $pK_a$ of approximately $4.75$.Phenol is a weak acid with a $pK_a$ of approximately $10.0$.Therefore,the correct order of $pK_a$ values is: Picric acid $(0.4)$ < Acetic acid $(4.75)$ < Phenol $(10.0)$.

The $pK_a$ values in $H_2O$ of picric acid,acetic acid,and phenol are in the order:

Similar Questions

What is the enthalpy change in $kJ$ when $1$ gram-equivalent of a strong base reacts with an excess of a strong acid?

Which of the following pairs of species is used in the preparation of antacid medicines?

Which are the bases of the above reaction $HCl_{(aq)} + H_2O_{(aq)} \rightleftharpoons H_3O^{+}_{(aq)} + Cl^{-}_{(aq)}$? Which base is weak?

What is the correct order of increasing basicity for the given conjugate bases $(R = CH_3)$?

Identify base $2$ for the following equation according to the $BRONSTED-LOWRY$ theory.
$HCl_{(aq)} + H_2O_{(l)} \rightleftharpoons H_3O_{(aq)}^{+} + Cl_{(aq)}^{-}$

Vedclass Test Series

Exam Paper Generator

Online Exam Module