CHEM 121 Lecture Notes - Lecture 8: Manganese, Equivalence Point, Redox Titration
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19 Jun 2015
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Chem121 - lecture 8 - redox reactions and acids and bases. Determine which element is oxidized and its increase in oxidation state. Determine which atom is reduced and its decrease in oxidation state. Choose coefficients for the species containing the atom oxidized and the atom reduced such that the total increase in oxidation state equals the total decrease in oxidation state. Balance any other atoms by inspection without changing the coefficients established in step 4. If the equation involves charged species, balance all other atoms except h and o by inspection, then balance the charge by adding h+ (if acidic) or oh- (if basic). C2h6 (g) + o2 (g) -> co2 (g) + h2o(g) C: -3 -> +4 (change of +7, carbon oxidized) O: 0 -> -2 (change of -2, oxygen is reduced) 2 carbons in c2h6 , each changing by +7 = +14 change requires 7 oxygens, each changing by -2 = -14.
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