EBK EXPLORING CHEMICAL ANALYSIS
EBK EXPLORING CHEMICAL ANALYSIS
5th Edition
ISBN: 8220101443908
Author: Harris
Publisher: MAC HIGHER
Question
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Chapter 11, Problem 11.15P

(a)

Interpretation Introduction

Interpretation:

Among HA or A principal species at pH equals to 6 has to be determined.

Concept Introduction:

The equation for buffer is described by Henderson-Hasselbach equation and it is a rearranged for of equilibrium constant, Ka. Consider an equation of dissociation of an acid as follows:

  HAH++A

Formula to calculate pH is as follows:

  pH=pKa+log([A][HA])

Here,

pKa is acid dissociation constant of weak acid HA.

[A] is concentration of conjugate base A

[HA] is concentration of acid HA.

(b)

Interpretation Introduction

Interpretation:

Among HA or A principal species at pH equals to 8 has to be determined.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Value of [A][HA] at pH 7 and 6 has to be determined.

Concept Introduction:

Refer to part (a).

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