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Unformatted text preview: 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 General Chem ist ry Lecture 102a In class notes for September 28, 2007 o Brom ine is reduced to a -1 charge o Brom ine is the oxidizing agent, it is oxidizing the vitam in c...
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