Chapter 19, Problem 19.13P

(a)

Interpretation Introduction

Interpretation:

Expression for Beer’s law for absorbance of mixture of $\text{HIn}$ and ${\text{In}}^{-}$ has to be written.

Concept Introduction:

Expression to compute absorbance as per Beer’s law is as follows:

  $A=\epsilon \cdot b\cdot c$

Here,

$\epsilon$ denotes molar absorptivity of species capable top absorb.

$b$ denotes path length in centimeters.

$c$ denotes concentration of species capable top absorb

$A$ denotes absorbance.

$T$ denotes transmittance.

(b)

Interpretation Introduction

Interpretation:

Value of $\text{p}{K}_{\text{HIn}}$ has to be calculated.

Concept Introduction:

Refer to part (a).