Discussion exp 8 - Using this concentration the amount of...

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Discussion The objective of part A of experiment 8 is to see the different absorbencies of different solutions with various solutions mixed together. Five test tubes were used to mix different amounts of Fe(NO 3 ) 3 , KSCN and HNO 3 and find their respective absorbencies. By forming a graph of the data collected a linear regression can be made giving the molar absorptivity coefficient as the slope of the graph. Now Beer’s law can be used to find Fe(SCN) 2+ . For part B of the experiment the same solutions from part A were used to make 10 different solutions with various amounts of each solution. The absorbencies were taken from each test tube. Using the molar absorptivity coefficient found in Part A the concentration of Fe(SCN) 2+ was found.
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Unformatted text preview: Using this concentration the amount of Fe 3+ and SCN-leftover at equilibrium can also be calculated. Using all three of these values, finally the value of K eq can be calculated. Topic 1: The assumption made in the calculation of the Beers Law plot in part A was that the slope of the linear regression is the molar absorptivity coefficient. Topic 2: By using Beers law the concentration of Fe(SCN) 2+ was found. Once this value was found the other two concentrations of Fe 3+ and SCN-leftover at equilibrium can be calculated. Topic 3: The equilibrium constants found are big telling us that in this reation products are heavily favored. Work Cited Chemistry 1310 Lab Manual; Leigh Bottomley and Charles T. Cox Jr....
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This note was uploaded on 09/07/2010 for the course CHEMISTRY 2200 taught by Professor Dr.rikitiktavi during the Spring '10 term at GCTS - Charlotte.

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Discussion exp 8 - Using this concentration the amount of...

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