q5 ans - CHEM 0970 (KOGUT) QUIZ 5 SPRING - 2008 MONDAY...

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Unformatted text preview: CHEM 0970 (KOGUT) QUIZ 5 SPRING - 2008 MONDAY 2/18/08 1 PM - 214 CHEVRON NAME SCORE Points for each section will total 10 pts. 1. (2 pts.) What is the conjugate acid of each substance below? NH H— N H; :41 2. (2 pts.) Circle the strongest acid in the set below: Set I: HClOz HClO 3. (2 pts.) What is the concentration of HCl in an aqueous solution with pH = 2.33? “1,33 ~‘3 )0 .3 4.68x M) ()nlCfi’k HZOQHgo'l—fi-CLQM’) 1002) 4, (4 pts.) What is the Kal value for a weak acid if a 0.200 M aqueous solution has a percentage dissociation of 0.800%? HA 4- HQ “6—3” filo—HA“ ‘ ZOO/V} (- 05;) I I'éOX‘ [(5—3 : 3 RA : flaggiMjAab :géoxgo—aghémdo é . "3); Vo— :. ‘2. ['2574/ «1’48"? '5 CHEM 0970 (KOGUT) QUIZ 5 SPRING - 2008 MONDAY 2/18/08 6 PM - 217 EBERLY NAME SCORE Points for each section will total 10 pts. 1. (2 pts.) Circle the strongest base in the set below: NHZ' NH ‘2’ NH; NH; 2. (2 pts.) Complete and balance. Label the acid, base, conjugate acid, and conjugate base. CNan) + H2000 *9 HCN + 0H“ Dane dad cm W. 3:? ’3 loo/g —+ h 3. (2 pts.) Compute the pH of 0.0200 M KOHM). ———’D {4 "’r 53 H a" (4" I (P014: — 106 [SH/J ( Q 6 : PJCDOJCZK/OFZ :’ {‘7 00: [0—072 /2.;? NH; 4. (4 pts.) Compute the pH of 0.0200 M NH4N03(aq). Kb for NHQE 2.0 X 10'5. [c023 NAM/03 —4 Mfing” My #59 2 2%; 7+ @07‘ WE "z “"7 - “’0” ‘Jf UJ 3f 3 #29” L”, I my 2 0 , K4 Kg gm? 59/0 £3277? I Ag 02% "3 fX/Oflfzzw 2 (7/2: aux/(j, 5% oy/D ’%§7.}y3y?#;5’5 CHEM 0970 (KOGUT) QUIZ 5 SPRING - 2008 THURSDAY 2/21/08 8 AM — 301 CHEVRON NAME SCORE Points for each section will total 10 pts. 1. (2 pts.) Complete and balance in the Bronsted system. 1, NH 2(m) + H20“) _. NLlB 4— 0H— 2. (2 pts.) Which of the following aqueous solutions has the lowest pH? All are 0.100 M. @ HCN NH; NH3 NaCl 3. (2 pts.) Circle the strongest base in the set below. \\ @ Hpoi- H2130: 1131304 4. (4 pts.) Whey-a .100 M solution of the conjugate base of a weak acid is preparediaée‘ ff A conjugate-lame 0.200% ionized. What is Ka for the weak acid? 75 + HZO M—x BHfiwfiH K h (ashram _ EMU E” 8 — @czowwoou 148 6 me) :(ZWd'LO Kg .. 4am“7 ’ “"5 - ," no ZA 25% I \\\j t CHEM 0970 (KOGUT) QUIZ 5 SPRING - 2008 FRIDAY 2/22/08 1 PM - 301 CHEVRON NAME SCORE Points for each section will total 10 pts. 1. (2 pts.) What is the conjugate base for each substance below? NH3 U H; Hso'; 5% 2. (2 pts.) Which reaction proceeds farthest from left to right? 2—— a) BF + H20 b) CN’ + H20 :— c) F" + H20 :- @02- + H20 :- e) H20 + H20 = 3. (2 pts.) Compute the pH of 0.0100 M Ca(0H)2(aq). (A {owl “4 C2: + Lat-f ‘ Aggw /0070 - 550C 701/ 7 :/ 32,0213 g [0H PHSIZJ We.) Compute the pH ofO. 100 M Ca(CN);(aq). Assume Ca(CN)2 is a electrolyte. Given Ki,l for HCBZI'; 4 X 1010. _ (cm:— . mm f CNZL tie "a? HC‘Ah‘ 074 /< —.— kw _ 2.0"” t 6. Howfgfi) .. 3 12%)“) 2‘3”); woe ’ 5’00“ =x2'3 F x flew/0’ soy P strong ...
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This note was uploaded on 04/07/2008 for the course CHEM 0970 taught by Professor Kogut during the Spring '08 term at Pittsburgh.

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q5 ans - CHEM 0970 (KOGUT) QUIZ 5 SPRING - 2008 MONDAY...

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