Absorbance Absorbance Absorption Spectrum of CoCl,(aq) Beer's Law Plot of CoCl, at =560 nm 0.5 045 06 03 04 03 02 y= 48571x+0oj0038 02 01 200 300 400 B00 Too 005 0.1 Wavelength inm) Concentration (M) Figure 1: Absorption Profile for cobalt (II) chloride' Figure 2: Cobalt (II) chloride standard curve (Beer's Law Plot)* www.ucirvine.instructre.com 2. Place an arrow at the maximum absorbance and extrapolate the wavelength max. Amax = include the unit). (be sure to 3. Determine by concentration of an unknown solution of cobalt (II) chloride having an absorbance of 0.25. Method 1: Extrapolation (mark the concentration on the plot) b. Method 2: Calculation (show your work) a.

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.