Today I finished the Thermochemistry unit by discussing the chelate effect and the content of experiment #32.
The chelate effect was determined based on the increased stability of a transition metal complex when a multi-dentate ligand is attached to it. When this happens, the entropy of the system increases, making the reaction more spontaneous. This is experimentally observed by the large increase in the formation constant of complex ions containing multi-dentate ligands.
Experiment #32 shows how you can experimentally determine thermodynamic quantities. In this particular experiment, the Gibbs Free Energy is calculated from the Ksp at two different temperatures, which will allow us to calculate the entropy and enthalpy.
I ended with a very brief intro on Electrochemistry. I will pick up with the rules for assigning oxidation numbers on Friday.
If you are keeping up with the material you should have the Thermochemistry homework set complete.
The exam next week will cover the material from REEL labs 3-6 and the Thermodymanics unit. If you have a conflict with the exam please fill out the conflict form posted on Carmen.
Song Played Before Class:
Kenny Chesney - This is Our Moment
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