Accetic acid and aq. `NH_3 ` are weak monobasic acid and weak monoacidic base respectively and `K_a` of acetic acid is equal to `K_b` of aq. `NH_3` .Which of the following statement are correct?

Options

A. All proportions of the above mixing would result in an neutral solution having `pH =7 at 25^(@) C `
B. If aq. `NH_3` is exactly half neutralized by HCl, then pOH of resulting solution is equal to `pK_a`
C. If acetic acid is exactly half neutralized by NaOH, then pH of resulting solutions is equal to `pK_a`
D. If acetic acid is exactly neutralized by aq. `NH_3` then pH of resuling solution is equal `1//2` pkw

Answer

B, C, D

Explanation

on complete neutralization `CH_3 COONH_4 ` is formed and pH ` = ((7 +pKa - pKb)/( 2)) = 7 (pKu)/(2)`
(b) At half neutralisation , buffer
` pOH =pKb + log ""(S)/(B) = pKb`
( c ) At half neutralisation buffer
` pH =pKa + log ""(S)/(A) = pKa`