Chapter 6, Problem 6A.1E

Interpretation Introduction

Interpretation:

Molar concentration of the solute has to be determined using the given data.

Concept Introduction:

• Equation for absorbance, A can be given as,

  $\begin{array}{c}\text{A = }\text{-log T}\\ \\ \text{A = }\text{-log }\frac{\text{I}}{{\text{I}}_{\text{0}}}\\ \\ \text{A = ε}\left[\text{J}\right]\text{L}\\ \\ \text{where,}\\ \text{A}\text{=}\text{Absorbance}\\ \text{ε}\text{=}\text{Molar}\text{absorption}\text{coefficient}\\ \text{I = Intensity of incident radiation}\\ {\text{I}}_{\text{0}}\text{ = Intensity of transmitted radiation}\\ \text{N = Number of species absorbed}\\ \left[\text{J}\right]\text{ = Molar concentration }\\ \text{L = Path length}\end{array}$

• Equation for absorbance, A, when percent of transmittance is known:

  $\begin{array}{c}\text{A = }\log \frac{100}{\%T}\\ \\ \text{A = }2-\log \%T\end{array}$