Instructions for Equilibrium Lab
For Part 1
Because you added a large amount of SCN-, and dilute Fe+3, essentially all of the Fe+3 are
converted to FeSCN+2. Therefore, [Fe+3] = [FeSCN+2]
Plot absorbance on y-axis, and [FeSCN+2] on x-axis. Use a best fit line! Do not connect the dots!
For Part 2
You can determine the [FeSCN+2] at equilibrium by using the graph from part 1, Absorbance
measured corresponds with [FeSCN+2] at equilibrium. Fill in table #2.
For Part 3
Determine initial concentrations of Fe+3 and SCNUse ICE to determine K
Change in x will be the same as the concentration of [FeSCN+2] at equilibrium.