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11-14-08%20-%20Lecture%2020%20-%20Fund.%20L%2c%20M

11-14-08%20-%20Lecture%2020%20-%20Fund.%20L%2c%20M -...

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COMBUSTION Hydrocarbons and other organic compounds burned in the presence of excess O 2 (g)
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COMBUSTION REACTIONS Atoms in the compound are produced as the following: H appears as H 2 O C appears as CO 2 N usually appears as NO 2 S usually appears as SO 2 O comes from O 2 in the air. 2 C 4 H 10 (s) + 13 O 2 (g) 8 CO 2 (g) + 10 H 2 O (l)
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Setup for titrating an acid with a base Setup for titrating an acid with a base
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Things to remember about titrations 1. Add solution from the buret. 2. Reagent reacts with compound in solution in the flask. 3. Indicator shows when exact stoichiometric reaction has
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Unformatted text preview: occurred. 4. At the stoichiometric point moles analyte i = moles titrant f Redox Titration The percent of tin in an alloy can be determined by treating the alloy with acid, which converts tin metal to Sn 2+ ions in solution. These are titrated with Ce 4+ ions, producing tin(IV) and Ce(III) ions. A 2.00 g sample of alloy was dissolved with acid and titrated with a solution of cerium (IV) nitrate. It required 38.46 mL of 0.2164 M Ce(NO 3 ) 4 to react completely with 45.00 mL of the solution of dissolved alloy. What is the percent tin in the alloy?...
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