Finising PbI2

Use the example data from http://site.iugaza.edu.ps/bqeshta/files/2011/03/Chemistry.pdf. p267 Conclusion What I really need is that you understand why we use spectrometers and how you can use data to I'd unknowns. Label and discuss your graphs. Write a nice strong conclusion. Reflect on the time limitation of 2 days on the lab and how in the future to be able to divide duties ahead of time to get things done. Calculations The initial concentrations of the Pb(NO3)2 and KI in the unknown test tubes #1-4 and the six standard solutions are calculated based upon the amount of dilution that occurs. The expression that relates the molarity to volume for each mixture is: Molarityconcentrated x Volumeconcentrated = Molaritydiluted x Volumediluted. The initial M KI in Test Tubes #3 and 4 will be 0.0120 M and 0.0150 M, respectively. Similar calculations are used to determine the molarities of the six standard solutions, which have a known concentration of I-, as summarized in Part 3 of the procedure, and shown in the data table below for the plot of Absorbance vs. [I-]. ICE charts are looking at concentrations initial, changing and equilibrium.

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http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch18/ksp.php