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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Need more equilibrium practice?

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

pH practice problem

pH practice problems http://www.sciencegeek.net/Activities/phcalcs.html

Neat Titration Curves

Click on the curve to reveal the video.

http://chemlinks.beloit.edu/rain/pages/titr.html

Great ka acid equilibrium constant tutorial

http://library.thinkquest.org/C006669/data/Chem/equilibrium/ka.html

Nice Quiz Practice on 5 types

http://www.sciencegeek.net/Chemistry/taters/EquationIdentification.htm

AP Net Ionic Equations Tutorials

AP Net Ionic Equations Tutorials Listed below are several websites that can be used to review and practice how to predict products of chemical reactions and then write net ionic equations for the reaction. These apply the same concepts and skills presented in your BLB Chemistry textbook (10th ed) on pages 129-142. 

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• Step-by-step, interactive tutorial illustrating how to determine the net ionic equations for reactions that occur, along with pictures and videos of the actual reactions can be found at: http://genchem.chem.wisc.edu/sstutorial/Text11/NetIonic/NetIonicIndex.htm 
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• A summary of the 5 basic types of chemical reactions, along with examples and practice at predicting products and balancing equations can be found at: http://www.files.chem.vt.edu/RVGS/ACT/notes/Types_of_Equations.html 
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• A general review of the process involved in predicting the products of chemical reactions can be found at: http://antoine.frostburg.edu/chem/senese/101/reactions/ 
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• Worksheet of practice problems for writing net ionic equations, with the answer key, can be found at: http://www.ccsf.edu/Departments/Chemistry/chem101a/resourc/net_ion2.htm