c123fe-sample-mc-data

c123fe-sample-mc-data - Physical Constants: Avogadros...

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Chem123/125 13 CHEM123/125 Exam Data Sheet Please detach, need not be returned Key formulas: At 298 K, Q n E E o log / 0592 . 0 ) ( - = ) 1 1 ln 1 2 T T ( R E = k k 1 2 a - - ; [A] = [A] o e - kt ; k t 1 2 = ln 2 = 0.693 1 ] [A ] [A ] [A = ; o 1 1 2 1 t k t k = o - - - ; K a = K K w b pH = p K a + log [A ] [HA] - ; ) 1 1 ln o T T ( R H = K K 1 2 1 2 - - PV = nRT K p = K c ( RT ) n a ac b b x 2 4 2 - ± - = Physical Constants: Avogadro’s Number N A = 6.0221x10 23 Charge of an electron e = 1.6022 x 10 -19 C Faraday constant F = 96485 C Gas constant R = 0.08205 L atm mol -1 K -1 = 8.314 J mol -1 K -1 Planck’s constant h = 6.6261 x 10 -34 J.s At 298 K, 2.303 RT / F = 0.0592, and K w = 10 -14 K a and K b for some Acids and Bases: Acid K a Acetic, CH 3 COOH 1.76 x 10 - 5 Chloroacetic, CH 2 ClCOOH 1.41 x 10 - 3 Ascorbic, H 2 C 6 H 6 O 6 7.9 x 10 - 5 ( K a1 ) HC 6 H 6 O 6 - 1.6 x 10 - 12 ( K a2 ) Benzoic, HC 7 H 5 O 2 6.46 × 10 -5 Formic, HCOOH 1.9 x 10 - 4 Hypobromous, HOBr 2.06 x 10 - 9 Hypochlorous, HOCl 2.8 x 10
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This note was uploaded on 03/01/2011 for the course CHEM 123 taught by Professor Pols during the Fall '07 term at Waterloo.

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