Quantitative Chemical Analysis 9e And Sapling Advanced Single Course For Analytical Chemistry (access Card)
Quantitative Chemical Analysis 9e And Sapling Advanced Single Course For Analytical Chemistry (access Card)
9th Edition
ISBN: 9781319090241
Author: Daniel C. Harris, Sapling Learning
Publisher: W. H. Freeman
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Chapter 9, Problem 9.12P
Interpretation Introduction

Interpretation:

The pKa of HA has to be calculated.

Concept Introduction:

Consider a weak-acid equilibrium reaction,

HAKaH++A-

The acid dissociation constant Ka can be given as,

Ka=[H+][A-][HA]

A weak acid is one that doesn’t undergo completion.

The negative logarithm of an equilibrium constant is called as pK .

The pKa of weak acid is the negative logarithm of Ka and can be given as,

pKa=-logKa

The value of acid dissociation constant Ka decreases with increase in pKa .

The value of Kw is calculated by the formula,

Kw=Ka×Kb

To calculate the pKa of HA

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