Chapter 6, Problem 6C.3E

(a)

Interpretation Introduction

Interpretation:

The ${\text{K}}_{\text{a}}$ value for given acid from ${\text{pK}}_{\text{a}}$ value has to be determined.

Concept Introduction:

The strength of proton donating of an acid is called acidity constant and also the acidity constant is said to be as their negative logarithms and which can be represented as follows,

    ${\text{pK}}_{\text{a}}\text{=}{\text{-logK}}_{\text{a}}$

When looking for the strength of acids and bases the following points should be noted,

• Weak acid always have the smaller value of ${\text{K}}_{\text{a}}$ and has greater value of ${\text{pK}}_{\text{a}}\text{.}$
• Weak base always have the smaller value of ${\text{K}}_{\text{b}}$ and has greater value of ${\text{pK}}_{\text{b}}\text{.}$

(b)

Interpretation Introduction

Interpretation:

The given acids in order of increasing strength have to be arranged.

Concept Introduction:

Refer to part (a).