To start off class, Mrs. Friedmann handed out three different worksheets. The first was a calendar for our LAST UNIT!!!! And the other two were worksheets we have to do for homework tonight.
Mrs. Friedmann suggested reading chapter 4.4 in our book to help us fill out the reading sheet and complete the problems on the Oxidation Numbers worksheet.
Here's photos of the worksheets just in case she doesn't post them (and yes, they're due tomorrow):
But before you get started on these, read the the following notes that Mrs. Friedmann gave to us in class, as well as section 4.4 in the book:
Okay, to explain a couple things, the statue of liberty part is in my notes because Mrs. Friedmann used it as an example. See, the original statue was made of bronze, which we know is a reddish/brownish color right? Then how come the current statue is green? Well, that's because the outer layer of bronze on the statue reacted with the oxygen in the air, causing an oxidation reaction to occur in which the bronze lost electrons, causing it to actually turn into a different substance (just on the surface though). This is actually a good thing because now this new outer layer (which is no longer bronze and appears green) serves as a protective coating for the bronze interior of the statue.
And LEO and GER are just mnemonics for remembering that:
When molecule
Loses
Electrons
it is
Oxidized and
When a molecule
Gains
Electrons it is
Reduced. (LEO the lion goes GER)
That's all! And the next blogger's Kevin Mihelic.
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