PreLab 6 - Pre-Lab Report The Spectrophotometric...

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Pre-Lab Report: The Spectrophotometric Determination of an Equilibrium Constant Purpose of Experiment The purpose of this experiment is to determine the equilibrium constant for the formation of a complex ion, FeSCN2+. Chemicals and Equipment Chemicals Equipment 0.00200 M KSCN, 0.200 M Fe (NO3)3 in 0.1 M HNO3, 0.00200 M Fe 0.10 M HNO3 Unit with calorimeter 1 cm cuvettes, Kimwipes, Graduated cylinder Safety and Hazards MSDS Classification Chemical Name Health Flammability Reactivity Contact Comment HNO3 3-Severe (Poison) 0-none 2-Moderate 3-Severe (Corrosive) Danger! It is a corrosive Can cause sever burns! Fe 3-Severe (poison) 0-none 2-Moderate 4-Extreme (Corrosive) Danger! This is a corrosive poison! Fatal is swallowed! KSCN Fe (NO3)3
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Experimental procedure Calibration Curve: Beer’s plot The purpose of this part of the experiment is to establish a calibration curve (absorbance versus ([FeSCN] 2+) for the determination of FESCN 2+ in unknown mixture. Our group prepared five solutions in which the ([FeSCN
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PreLab 6 - Pre-Lab Report The Spectrophotometric...

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