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In class notes for September 28, 2007

In class notes for September 28, 2007 - General Chemistry...

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General Chemistry Lecture 102a In class notes for September 28, 2007 Chapter 4 OWL redox problems due Monday. Chapter 5 OWL problems are now available. o There is only two attempts. Last lecture o Redox reactions o Assigning oxidation numbers Today o Finish redox things Molecule of the day o Ascorbic acid (vitamin C) The alcohols cause the molecule to be acidic Vitamin C is a reducing agent (reductant) Gets oxidized so that proteins do not get oxidized o When you breathe in oxygen a bunch of consequential effects happen Remember pg 170 in textbook about oxidation numbers. o In K 2 O 2 oxygen has an oxidation number of -1. o Fe 3 O 4 the oxidation number is 8/3 0=3x + 4(-2) 8= 3x X= 8/3 o OsO 4 A liquid Very covalent, not ionic o Vitamin C- o C 6 H 8 O 6 + Br 2 2HBr + C 6 H 6 O 6
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General Chemistry Lecture 102a In class notes for September 28, 2007 o Bromine is reduced to a -1 charge o Bromine is the oxidizing agent, it is oxidizing the vitamin c o
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