chem final review 2 answers - Opalka - Prelim II Review...

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Unformatted text preview: Opalka - Prelim II Review Session - Cornell University - Fall 2006 Part 1: Predict the Lewis structures, indicate whether the bonds are a or 7: bonds, propose a hybridization scheme for each one. 3 FCM35' 9.— 3: o =>‘*€§>=)SQ fire:‘5+1+q+b-\b*\= A. NH2COOH ® O—_‘_ ‘7‘ FCC: 9-0....‘2025 36925 392. Me“ :0: - - wq- a=o=>‘|€e=>3?3 - - U .6) Fc'o- ’ — <5 '1 H-N—c—‘o-H Fco awn-3:03“? e J, ' L L n a \I L C" H 0' o- 0' B. C2N2 _ = - Y we- H war 517. Fee S? 59 S? S? — L J t L Pa“ = S— a- 3 r O :NEQ‘CEN' PC _.k\-O~“\20 ~£ ‘1' C UNIT 5 C CNCF _ - fie‘=H+5+H+q,a,: 3 . S? \-c. :W-lad-O ENC" 'F‘é) (59 FL. :H*O-‘\:O F-C~CEN: F<_ :q—O*“=° ‘\[‘\ lfis-aflazo o- ‘F‘ 397’ Fe” ' - D. C H + ‘ 5‘ 9'“ 1h: :L\+5><?>+ \xk‘b— 1 (N 2h p. H (37“ 5.1 ® I “ :SN ‘ Ll ._"’ - x’N ‘“‘*IJ c - “x- a, u ,H e: ,u hflm‘tdnoeuon \s 2 N/ ._. c_ - N: 4-”5 <1. - N: ‘ u \mC z. > \ Mex-e. ¢~\§Q\(u\-\- no "‘ IQ/ LG) \ u R WON/l \-\ l \ \-\ Q14R\W~u\°. dufi. *0 ' \ fl (9‘ H —- {K'J‘ ‘Efiaonume, H 5+ u 14 I4 Part 2: Using Information about Lewis Structures to Analyze Compounds: “A “Jan-$229? m A. Longest C-O bond length / \' “OSKH A} - HZCO, HC02' ,and CH30H HLCO-blae O “coffifie- g) ‘1 - \\ fa C_=O [L C— —-O 4_#> \c_ = o / H ’ / H l—l E‘O‘Za B-O. 2LS B. Draw the dipole moment for each compound, disregarding bonds to MINER; 75 “=15 HZNBHg ,NHZNHZ, NH20H \A E 3"; 7N5: N61 knit :fit‘ie’ N “to \A :5 l‘\€ - \ . V /1-\ (5 '%\§ _- an /N \ \4 u\ - .- x” \4 \EM3 l” H Q‘Jr N "' N N ‘29' ‘i/ “ \-\ H / " +—————-‘> Opalka - Prelim II Review Session - Cornell University - Fall 2006 Part 3: Molecular Orbital Theory Construct a M0 diagram for CN, and rank the following in terms of bond strength and bond length: CN+, CN, and CN‘. Indicate whether the compound is paramagnetic or diamagnetic. 1* age— _HW 033% filan A ‘_:\¢\*:\Qi ’/ r V a 1 1 , \ e M ———— fl \ \ \ \ \ \ \ 1 5w: /‘ l L 3—— a? 121% \LL 1 L /¢\,‘,a (1» \G* Eo:%('fir~a3:ad§ , ’ \ 1% as '“z ,7 ’" fl \ \ \ \ \ \ x \ \ > as Bow : 500—26 =82 \ , ’ \ / \ / / 52.5 r\\ L5 pQ<Q~WVO%\r\L'\\Q Cksl‘bl‘e— CM— 1-) \OC— _* _. gocw‘élfi(‘3*9~3:5 — ——. iE- -— -— it. J-L‘D 1L 41": cm“‘>CN><_.\y* .LL». 1; .k 9‘me wm‘m“ ‘3 1k 5 _\ “Cb _ WWW. WWW ti; m “We Opalka - Prelim II Review Session ° Cornell University ¥ Fall 2006 Part 4: Transition Metal Chemistry A. Provide the metal oxidation state, d-electron count and state how many unpaired electrons there are for the following complexes. oLmNéCQ\ ‘. CCIHO 2* 3 ‘—'————-—- llflzkl ch-Nrrbd x+L—D+ ots\=a* ._ .— x-\=a _ . i=3 '3: DEQCKAT'QC} l- l 1— ii. [CoCl(N02)(NH3)4]+ (low Spin) x + (43+ (—D + Lox‘gh =2 \ ___._- —. — '=. \ a; 3* -_; (D 23;; \ K 3 C° W L 1L 1.» iii. [Cr(en)3]3+ m «eat—eel A + (0133 ‘- 5 Cry :5 d? ,__ __ K23 L L L B. Provide the d-orbital splitting diagram for the following metal complexes. ”-?: on gum} Label each d-orbital and state whether the complex is paramagnetic or diamagnetic. a. [MoCl6]3' :3 mmmamk ‘ C; {\éx =3 max ungouved Q\— =3 \§%Q“A i) ‘3 M\\ A) week.“ e\ec;\(o»r~5 \D' X Jr Pugh-:3 3§M+Qon x. “(a 2 " \‘ E C ¢\.\\e 1:. 3 __ \"\\‘ GER E chug c3» 17- 59* n 3-i- '3 Mo ='-> ck L 3_ L 5 (VB AK} A U51 3+ b. [C0(en)3] =1) OCEAN éftk\ ‘ en :3 \{cbm‘cx =3 \o‘roflg‘ A b Sfi‘ovofi RIQ\Q)\ 5 :‘\c;c.\f::v~‘s x. a—(oXt’b = 3 \y L‘s $K¥u¢fiuciw ' C.£\.\‘~4d Co“ $ 6‘” "m _ \mw WJQR n Jillrflir Opalka ‘ Prelim II Review Session - Cornell University 0 Fall 2006 _ - \9 3g :5 hits“ sex“ ilk-V (.‘N‘h‘: -— c. [FeCl4] «amnesch com? mm?!“ X. —‘\ '2 “i w 1. L 3. \‘5’ K's; '5 Ages A“? dog A Man; u“?c-\Wd chfid? L L eJedwnS L‘Kl . L31 A 1‘! C. If [Cr(H20)5]2+ absorbs light with a wavelength of 700nm what color is the ‘3 Y (T solution? A (K K “B (Mamba Fed -‘ 1 CM??? 0&3 \I D. Order the following complexes in order of increasing ligand strength without consulting the spectrochernical series. The colors have been made up for the purpose of this problem. I 3+ R 0 \ G- % \ V 3- [F3(H20)6l appears blue \ I fl 1 I (SAVED!le O (chbg :3) muflt Etmittggu) b (Tad A. \ofics ShoC-\ l 1 13- [FC(OX)3]3' appears green L Q] ‘ ohmsb‘s NA =5 \ 0w93‘\' {MA by: T; Sm“ A \om E hw‘sx‘ 3 . F SCN ' - 1 E __ ES: E- C l 6( )6] appears purp 6 \cu cbe A we. know 3&(mc5 (WV). \;%Qn¢g have, at. mists: A moot QWACX \i%qné\ Baum Cx "E‘.’(‘<\Q.\\ S‘Kconag wean:- Q\'E:.\C,\ (xexA g grrgxwe A ~\« _ \mgzzs ch’ > H10 > 0x1 ...
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This note was uploaded on 03/31/2008 for the course CHEM 2070 taught by Professor Chirik,p during the Fall '05 term at Cornell University (Engineering School).

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chem final review 2 answers - Opalka - Prelim II Review...

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