Chapter 11, Problem 11.67P

Interpretation Introduction

Interpretation:

The effect of concentration in the titration of weak acid with a strong base has to be plotted for a family of titration curves for ${\text{pK}}_{\text{a}}\text{=6}$.

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.