Title of Experiment: LeChatelier’s Principle and Determination of Kc
Report Submitted By: Aaliyah Stovall
Partners: Hannah
Date Submitted: 10/31/17
Purpose: The purpose of this lab was to study the effect of changing reactant concentration and
temperature on equilibrium, and to calculate an equilibrium constant using spectrophotometry.
Procedure: We prepared a solution of 25 mL 2.00×10-3 M Fe3+ and 25mL of 2.00×10-3 M
SCN- in equal concentrations. Then, we made 5 more solutions, by mixing 5 mL of that previous
solution in 5 different ways, each time adding a different disturbance for the reaction. For the
first tube we added 2 more drops of the 0.200 M Fe3+ solution. For the second tube we added
two drops of the 0.200 M SCN- solution. The third sample was heated and the fourth was cooled
while the fifth was not altered and used as a reference tube. Afterwards, we observed and
recorded the physical changes of the samples.
Data & Results
Observations followed by results:
IF it gets darker, the equilibrium shifts to the right.
