Chapter 16, Problem 16.55SP

Interpretation Introduction

Interpretation:

The value of ${\text{K}}_{\text{n}}$ for the neutralization ofaniline (a weak base) by vitamin C (ascorbic acid) should be determined.

Concept Introduction:

• Neutralization is the chemical reaction in which acid and base react quantitatively with each other resulting in formation of salt and water.
• Neutralization constant is related to acid dissociation constant ( ${\text{K}}_{\text{a}}$ ) and base dissociation constant $({\text{K}}_{\text{b}})$as:${\text{K}}_{\text{n}}\text{=}\frac{{\text{K}}_{\text{a}}{\text{×K}}_{\text{b}}}{{\text{K}}_{\text{w}}}$

  Where K_w is ionic product of water.

Given:
${\text{K}}_{\text{b}}$ of Aniline $({\text{C}}_{\text{6}}{\text{H}}_{\text{5}}{\text{NH}}_{\text{2}}\text{)=4}{\text{.3×10}}^{-10}$

${\text{K}}_{\text{a}}$ of Vitamin C ${\text{(C}}_{\text{6}}{\text{H}}_{\text{8}}{\text{O}}_{\text{6}}\text{)}=8.0\times {10}^{-5}$