PraticeExam2.S01S02.key

PraticeExam2.S01S02.key - EXAM 2 2001/2002 1. (6 pts) Give...

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Unformatted text preview: EXAM 2 2001/2002 1. (6 pts) Give the oxidation state of the central metal atom in each of the following coordination compounds and the coordination number. Oxidation State Coordination Number [Co(en)2Br2]Cl + 3 Q miFe(CN)6] “L é [FeOH(H20)5]C12 + 3 (9 2. (4 pts) Give the systematic name for the following compounds. [Fe0H(H20)s]Cl2 Eat/rim gqua hadraxa iron (BI) chloride 3. (4 pts) Write the chemical formulas for the following compound. Bis(ethylenediamine)dihydroxoiron(III)chloride [Fa (an) a(0H)a F“ 4. (6 pts) Draw the optical isomers of the octahedral complex [Ni(en)2Clz]. F’\ 3Z\ I” -—z j ‘3, _ 3—; \ I. “'4. j X Z \__/ EXAM 2 2001/2002 5. A solution made by dissolving 0.875 g of Co(NH3)4C13 in 25.0 g of water freezes at —0.56°C. a) (6 pts) Calculate the number of ions produced when 1 mole of Co(NH3)4C13 is dissolved in water. lmol ’ 0.875 3 Co(”“;)t.Cl3 (Q3133 : @003]: wt _ 0. 00375 final VVl - __ ‘ mal 0.0251(3 ' 0"5 AC?) A T=~t KfiVVI i — Ai— _ ,O'S‘mC 0- (IIE‘aC L: a b) (4 pts) Suggest a structure for the complex ion. 1" _ {Ca {NH} Z] 't‘ C N“; + iii}an l NH} EM 0,; C0, 0r trams Isome" % Cl Cl, \ NH}, 6. (6 pts) Which of the following has the lowest freezing point? Circle the answer. 0.1 m NagPO4 0.2 m MgC12 0.35 m CH3COOH L km ‘04 . A~ H(.i)':o'/.HM -z(35):o.7w. 3t-Z):a.6m “QWZMM-smum’“ ‘- =) 30.55944 7. (6 pts) Draw the d-orbital diagram for the complex K3[Mn(CN)6]. Cyano is a strong field ligand. How many unpaired electrons are there? ————-.— Q h” [W36 A I lowsPI‘n , H l mflgr 0‘ Detail/realm» El .41 1 1. Q MMFMMA electw‘“ EXAM 2 2001/2002 8. (8 pts) Draw the structure for each of the following compounds. Draw cis and trans isomers if there are any. a) 2,3—dimethy1-2-butene t ‘ CH ‘5 C \ / 3 C::C « / H C \ J CH; b) 3-methy1—2-pentene . V C l" L C H} H H3C\ /’ HC /C5 C’ 2: C 5 \ _' ./ \, /C«C P, + ans CH5 kl f \cthcnj c) 4,4—dimethylcyclohexanol r C I 5 0 rl; C, H 3 H o ’ 9. Complete the following acid catalyzed esterificati on reactions. 0 ®(fim) CHflDOH + anal—9 CH33§0CHJ + H10 0 H w(5mo CHfifibOH +-HCOOH-—> CkarQ<7C H +’ H30 10. (8 pts) The term proof is defined as twice the percent by volume of pure ethanol in solution. Thus, a solution that is 95% ethanol by volume is 190 proof. What is the molarity of ethanol in a 92 proof ethanol/water solution? The density of ethanol is 0.80 g/ch. . . ,Hémk 7Q PT‘OO‘P I) ethanol V0|uwe :2 ifla ml, SQlVl malaru’lj ,M CHJCHZOH L16 g/mal moles Solwi’c limo] (l00‘mL) (l%000mL> ’ ‘07: \g,c7l"l EXAM 2 2001/2002 11. (8 pts) Draw the structural and geometric isomers of chloropropene. There are a total of four isomers. If you draw more than four, you must cross out the ones that are incorrect. \ / \c :8 ,0: C H/ \H H \ H H 1? CH3 H\C‘:c/CS l\CZC/ Cl/ \ H H/ \Cl 12. a) (4 pts) Draw cyclohexanol. 0H 0 C6 “120 a I ‘2 —— Cw E b) (4 pts) Drawaketone that is an isomer of cyclohexanol. / ‘ + t _ C; C H 0 ._., ke’rovw, W‘“5 0‘ 50 6 '2 2 have Moe SCRW‘C ¥or vw/‘lol C3 C6 Han C F H CH CH c) (4 pts) Draw 2-butanone. 0 d) (4 pts) Draw an aldehyde that is an isomer of 2-butanone. 0 m U K fiH C‘li CHZ CH. C H - c ricarmwiol VVIVLS ‘(7 be €11,180 13. (8 pts) Calculate the freezing-point of an antifreeze solution that is 45% by mass ethylene glycol (HOCH2CH20H) in water. K = 1.86 °C kg/mol \/\/\—’ 1:1 . 9 H53 MacrILCHZaH [3T1 -— L {3‘44 L/54 bfl W55 :) (0‘7 950‘” :> 55‘ 9 "i SOHO/Hf . L/5 ('W’ mommy.- = |3rZVVl (55.9)(‘i'5'325) 151' : —-(I)(| . 85aC‘49/ch-l)(l3'z MOI/k9) AT: —2L{.s’c : Tier—T18 90%: 4 ...
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PraticeExam2.S01S02.key - EXAM 2 2001/2002 1. (6 pts) Give...

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