lec19_whc_b - Exam Feb. 26; Room Assignments Room 1051 SLB...

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Exam Feb. 26; Room Assignments ALL OTHER SECTIONS ( B01, B03, B05, B08, B10, B11, B13, B14, B18, B19, BR0 ) Meet in Sciences Lecture Hall Edna B06 2076 SLB Edna B02 2068 SLB James B15 2059 SLB James B09 2051 SLB Mateo B16 1076 SLB Mateo B12 1068 SLB Troy B20 1075 SLB Troy B04 1067 SLB Kelly B17 1059 SLB Kelly B07 1051 SLB TA Section Room
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Announcements • Review Session--Wednesday, Feb. 24, 5:-6 pm; 1100 SocSci (Death Star) • Exam on Friday – Chaps. 16,17 , 18.1
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Acetic acid Acetic acid Trichloroacetic Trichloroacetic acid acid K K a = 1.8 x 10 = 1.8 x 10 -5 K K a = 0.3 = 0.3 Sample Exam Question – Acid Strength Which is the stronger acid, acetic or trichloroacetic acid? Solution:
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A 2 (g) and B 2 (g), each at 0.1 mol/L, are introduced into a 10L container. At equilibrium the mixture contains 0.08 mol/L AB(g). What are K c and K p ? Sample Exam Question– Equilibrium (g) 2NO (g) O N 2 4 2 Solution Changes -x -x +2x [] 2 2 2 22 0.08 0.06 c AB K AB == =1.8 0.04 / xm o l L ⇒= A 2 B 2 AB Equil 0.1– x 0.1– x 2x Initial 0.1 0.1 0 Known Equil 0.08 atm Æ Equil 0.06 0.06 0.08 () n pc KKR T = c K= 1 . 8 A 2 (g) + B 2 (g) 2 AB(g)
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H 2 (g)+I 2 (g) 2HI(g); K c = 48.9 [H 2 ] = 2.8x10 –2 mol/L, [I 2 ] = 8.9x10 –3 mol/L, and [HI] = 1.45x10 –3 mol/L. 15E Revisited – Approaching Equilibrium Q c = = = 8.4 x 10 -3 < K c =48.9 [H 2 ][I 2 ] [HI] 2 2.8x10 –2 x 8.9x10 –3 ( 1.45x10 –3 ) 2 Q must increase to reach K More products must therefore be produced Reaction Æ right Equilibrium or to left or right?
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CO(g) and H 2 O vapor, each at 0.25 atm, are introduced into a container of fixed volume. At equilibrium the mixture contains 0.1 atm of CO 2 (g). What is K p ? Review – Equilibrium Table (g) 2NO (g) O N 2 4 2 CO(g) + H 2 O(g) CO 2 (g) + H 2 (g)
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Changes in P -x atm -x atm +x atm +x atm (g) 2NO (g) O N 2 4 2 () 22 2 2 2 2 2 0.1 (0.25 0.1) 0.25 CO H P CO H O PP x K x == = =0.44 0.1 xa t m ⇒= Solution: CO H 2 OC O 2 H 2 Equil P 0.25– x 0.25– x x x Initial P 0.25 atm 0.25 atm 0 0 Known Equil P 0.1 atm Æ Equil P 0.25– 0.1
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This note was uploaded on 06/13/2010 for the course CHEM 995940767 taught by Professor Topadakis during the Spring '10 term at UC Davis.

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lec19_whc_b - Exam Feb. 26; Room Assignments Room 1051 SLB...

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