Experiment9 Spectrophotometric Analysis of Cobalt II Chloride Lab Questions

timer Asked: Apr 12th, 2019
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Here is the whole instructions for the full manual lab, all I need is to solve the pre- lab and experiment questions.

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School: University of Virginia


Experiment#9 prelab Questions
Question 1
a. Beerโ€™s Law.
Intensity of incident light decreases exponentially as the concentration of absorbing
medium increases arithmetically
b. Lambertโ€™s Law.
When a beam of light is allowed to pass through a transparent medium, the rate of
decrease of intensity with the thickness of medium is directly proportional to the intensity
of light.
Question 2
Distilled water: 2.0mL
CoCl2: 3.0mL of 0.150M

Molarity = ๐‘‰๐‘œ๐‘™๐‘ข๐‘š๐‘’
Moles = 0.150 x 3/1000 = 0.00045 moles
New Volume: 2.0mL + 3.0mL = 5mL=0.005L
Molarity = 0.00045 moles/ 0.005L = 0.09M

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