# Chapter 16, Problem 16.79QP

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### CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933

#### Solutions

Chapter
Section
FindFindarrow_forward

### CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933
Interpretation Introduction

Interpretation:

From the given problem statement,

Which conjugate base ( A-,B-orC- )  has the smallest Kb value has to be explained.

Which anion is the strongest base has to be explained.

Concept Information:

Acid ionization constant Ka :

The equilibrium expression for the reaction HA(aq)+H2OH3O+(aq)+A-(aq) is given below.

Ka=[H3O+][A-][HA]

Where Ka is acid ionization constant, [H3O+]   is concentration of hydronium ion, [A-]   is concentration of acid anion, [HA] is concentration of the acid

Base  ionization constant Kb

The equilibrium expression for the ionization of weak base B will be,

B(aq) +  H2O(l)HB+(aq)+OH-(aq)

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

Where,

Kb is base ionization constant,

[OH] is concentration of hydroxide ion

[HB+] is concentration of conjugate acid

[B] is concentration of the base

Relationship between Ka and Kb

Ka×Kb=Kw

Where,

Kw is autoionization of water.

The autoionization of water:Kw=[H+][OH-]=1.0×1014

In general, there is a reciprocal relationship between the strength of an acid or base and the strength of its conjugate.

To Explain:

Which conjugate base ( A-,B-orC- ) has the smallest Kb value

Which anion is the strongest base

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