Quantitative Chemical Analysis
Quantitative Chemical Analysis
9th Edition
ISBN: 9781464135385
Author: Daniel C. Harris
Publisher: W. H. Freeman
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Chapter 9, Problem 9.19P
Interpretation Introduction

Interpretation:

The pH and the fraction of association of 0.100M weak base has to be calculated.

Concept Introduction:

pH of base solution:

Consider a reaction of weak base,

B+H2OKbBH++OH-

The value of Kb can be calculated as,

Kb=[BH+][OH-][B]

Where Kb is called as base dissociation constant.

The value of Kw is calculated by the formula,

Kw=Ka×Kb

The pH of weak base is calculated using the equation,

pH=[H+]=Kw[OH-]pH=-log[H+]

Fraction of association:

Consider a reaction of weak base,

B+H2OKbBH++OH-

The value of Kb can be calculated as,

Kb=[BH+][OH-][B]

Where Kb is called as base dissociation constant.

α=[BH+][B][BH+]α=xF

Where α is called as Fraction of association of base

To calculate the pH and the fraction of association of 0.100M weak base

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General Chemistry | Acids & Bases; Author: Ninja Nerd;https://www.youtube.com/watch?v=AOr_5tbgfQ0;License: Standard YouTube License, CC-BY