Lecture1 - Tuesday and Thursday 11:00 12:15 Davidson Hall...

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    Tuesday and Thursday, 11:00 – 12:15 Davidson Hall, Room 3
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Dr. Sungsool Wi ± Office: 3107 Hahn Hall ± Phone: 231-3329 ± Email: [email protected] ± Office Hours: Tuesday 2:30 – 4:30 PM Thursday 2:00 – 4:00 PM by appointment ± See Blackboard for lecture stuff & assignments
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Text Book ± Exploring Chemical Analysis ± 3 rd Edition ± Daniel C. Harris
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What is Analytical Chemistry? ± It is a branch of chemical science to identify compositions, concentrations, and structures of unknown compounds or materials.
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Quantification of Matters Coins, pebbles, balls, etc.: Fluids (water, gasoline, air): Grains, meats, etc.: => Weight => Volume => numbers
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Chapter 1 Chemical Measurements How do we quantify chemicals? H 2 SO 4 (l) => Volume
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NaOH (s) => weight Chemical balance
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H 2 SO 4 + 2NaOH -> Na 2 SO 4 + 2H 2 O How do you quantify chemical reactions ? Mole: Avogadro’s number (6.022 x 10 23 mol-1) of atoms, molecules or ions is defined as 1 mole Chemical Reactions => Count numbers: stoichiometry
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Carbon: 12 C 12 (exact) 98.93 13 C 13.00335 1.07 Mass number Abundance (atom %) Weight average = 12 x 0.9893 + 13.00335 x 0.0107 = 12.01
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Examples: CuSO 4 •5H 2 O 126.54 g MW (FM) = Cu + S + 9O + 10H = 63.546 + 32.065 + 9 x 15.9994 + 10 x 1.00794 = 249.69 g/mol Mole of CuSO 4 •5H 2 O = = 0.50679 mol 126.54 g 249.69 gmol -1 Mole of Cu +2 = mole of SO 4 2- = mole of CuSO 4 •5H 2 O Mole of H 2 O = 5 x mole of CuSO 4 •5H 2 O
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This note was uploaded on 04/17/2008 for the course CHEM 2114 taught by Professor Wi during the Spring '08 term at Virginia Tech.

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Lecture1 - Tuesday and Thursday 11:00 12:15 Davidson Hall...

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