Chapter 4.8, Problem 2RC

Interpretation Introduction

Interpretation:

It should be determined that the concentration of $KMn{O}_4$ in a solution which has an absorbance of $0.442$.

Concept introduction:

• Absorbance (A): it is the negative logarithm of transmittance of the sample taken. And its value increases as the concentration increases.

$\text{Absorbance}\text{=}\text{-}\text{log}\text{T}\text{=}\text{-}\text{log}\frac{\text{P}}{{\text{P}}_{\text{0}}}$

T is the transmittance and it is the ratio of the amount of light transmitted by or assign through the sample (P) relative to the light that initially fell on the sample.

$\text{Transmittance}\text{(T)}=\frac{\text{P}}{{\text{P}}_{\text{0}}}=\frac{\text{Intencity}\text{of}\text{transmitted}\text{light}}{\text{Intencity}\text{of}\text{incident}\text{light}}$

• $\text{y}\text{=}\text{mx+c}$ is a straight line equation where m is the slope and c is the intercept.
• Concentration of the solution can be expressed in many ways; molarity is one of the important parameter to express the concentration of solution. And it is a measure of the concentration of a solute in a solution.