Chapter 11, Problem 11.66P

Interpretation Introduction

Interpretation:

The effect of ${\text{pK}}_{\text{a}}$ in the titration of weak acid with strong base has to be plotted.

Concept Introduction:-

Titration of weak acid with strong base:

When a strong base is titrated against weak base it involves the direct transfer of protons from the weak acid to the hydroxide ion.

Spreadsheet Equation for titration of titration of weak acid with strong base:

$\varphi \equiv \frac{{\text{C}}_{\text{b}}{\text{V}}_{\text{b}}}{{\text{C}}_{\text{a}}{\text{V}}_{\text{a}}}\text{=}\frac{{\text{α}}_{\text{A}}\text{-}\frac{\left[{\text{H}}^{\text{+}}\right]\text{-}\left[{\text{OH}}^{\text{-}}\right]}{{\text{C}}_{\text{a}}}}{\text{1+}\frac{\left[{\text{H}}^{\text{+}}\right]\text{-}\left[{\text{OH}}^{\text{-}}\right]}{{\text{C}}_{\text{b}}}}$

Where,

${\text{C}}_{\text{a}}$=initial concentration

${\text{C}}_b$=final concentration

${\text{V}}_{\text{a}}$=volume of the acid

${\text{V}}_{\text{b}}$= volume of the base

${\text{α}}_{\text{A}}$ =acid dissociation constant.

$\varphi$ =fraction way to equivalence point.