Half Reactions 5/6/14
Hello! today we started in class the homework, which was the chapter 4.4 worksheet and the Oxidation numbers worksheet. For homework tonight we have the three worksheets on Electrochemistry, found here.
And here are two funny chem jokes. Please enjoy.
Today was a notes day in class. We followed Mrs. Friedmann as she took these incredible notes.
The five main questions that need to be asked before determining Oxidation numbers are:
1) Is the substance an element
2) Is the substance ionic?
3) If ionic, are there monatomic ions?
4) Which elements have specific rules?
5) Solve for whats left!
I was very confused with Oxygen, as I am sure many others are. The Oxidation # for the Oxygen atom is almost always -2. Only when the charge for Oxygen is -1 and combined with another Oxygen atom (O2) is the Oxidation number -1. Ex: H2O2, Na2O2
Hope this helps!
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