Module $5$: Apply Beer's Law to Determine Concentration of Dye

Lab Data

Analytical wavelength

Analytical wavelength for red dye $(nm)$

$500\mathrm{.}0$

Calibration curve

$\backslash$table$[[$Solution$,$Dye concentration $(M),$Absorbance$],[1,30\mathrm{.}20,\mathrm{.}747],[2,15\mathrm{.}10,\mathrm{.}390],[3,7\mathrm{.}56,\mathrm{.}198],[4,3\mathrm{.}78,\mathrm{.}114],[5,1\mathrm{.}89,\mathrm{.}056]]$

Molar absorptivity $(M^{-1}c{m}^{-1})$

$\mathrm{.}0243$

Unknown solution

Absorbance

Concentration of unknown red dye $(M)$

How to calculate concentration from absorbance