Explanation The dissociation of weak acid HA in water can be expressed as- H A + H 2 O ⇌ H 3 O + + A − . The degree of dissociation of the acid α = K a C a . On plugging the given values, α = 4.0 × 10 − 9 0.040 = 3.16 × 10 − 4 . The concentration of H 3 O + , A − and HA is α × C a , α × C a and ( 1 − α ) C a respectively

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ISBN: 9781337398909

Author: Lawrence S. Brown, Tom Holme

Publisher: Cengage Learning

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Chapter 12, Problem 12.72PAE

Interpretation Introduction

To determine:

The equilibrium concentration of H3O+, A− and HA.

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Chapter 12, Problem 12.71PAE

Chapter 12, Problem 12.73PAE

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