Practice Exam 1 (Key)

Practice Exam 1 (Key) - Name: Practice Exam 1 Chemistry 333...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Name: Practice Exam 1 Chemistry 333 Fall 2010 These are questions taken from previous exams. The questions on the actual exam will be very similar. Questions may also be taken from the homework. This exam is about 1.5 times as long as the one you will have in class. Chemistry 333 Practice Exam 1 1) Draw a valid Lewis Structure for the following structural formulas. Make sure to: a) Show all electrons b) Assign formal charges. c) Give all appropriate atoms an octet. A) [CHQNOJ " -' ~" “ice H’ .6? @// a? I} @/0' P a (,3 EN \ Ma 9 H .9.» 1+ ,_ .. B) [HNCCI]+ é—D .. q. H“NEC’€:\‘ 06‘ l—l—Nzcr-«Ll: a. L? on H 2) For the following structure: 0: 2N H a) What is the hybridization of the nitrogen? 5 P 3- b) What is the hybridization of the carbon? 5 i c) What is the geometry of the nitrogen? +n Swami q? Lei/tar d) What orbitals form the C-N singie bond (sigma—bond)? Si cm C amt" 5332. D“ I“! e) What orbitals form the ON double bond (pi-bond)? f on C. and P on M $62“ Wig: {0 (fire [at Whflbndl of! :52 A Womcww Chemistry 333 : Practice Exam 1 3) Draw a resonance structure for the following molecules that have full valence shells for all atoms. Use curved arrows to show the movement of electrons on both sides of the double-headed arrow. (Note that lone pairs are not shown. But the formal charges are correct.) A) (9*? ' 4* s) i . “3C xN¢W/‘ Gib : H _ If possmle, draw a resonance \ I c “J” l : structure where all appropriate “ M a : atoms have an octet or duet. 4 \J ' ' as; t resonate ; . (magi of:ch tariff LE-l does not” mace cm ocme 9n can L5 ‘2 (45.50" cawf’o baron C) For each set of resonance structures, label the major resonance structure. Explain your choice. ' 69 72¢ giro-6564b an +Ae, fimfl'ufragbmmm, WCM MW an fie, ware Mwyghfliag W558!” arms when 4-39-44 @ 7109:2239 esteem-s waaml massages, axioms M02; sic-EVES! 755% thw #WWWPW kl airport 1‘1"?— 4MCW’%&Q“>~ .3- I Chemistry 333 Practice Exam 1 4) The alcohol below has" the chemical formula 05H120. Draw four different primary alcohols with the same chemical formula. OH AA Wk? MO H Haw a 5) Assign the appropriate formal charges to the atoms in the following structure. (There are no implicit hydrogens or lone pairs. What you see is all that is there.) il-Bri H :5-:@ | | @C— l —CwC=C:N—H 2.0:? H H H—N—mH Chemistry 333 I ' 2 l ” Practice Exam 1 6) ‘ Multiplechoice: a) Circle all the molecules that are tetrahedral. b) Circle all the molecules that have a molecular dipole. CH3+ 8H4" HCCH c) Cross-out the structures that would lead to an invalid Lewis structure? gag: ‘ cl) List all the functional groups in Naproxen and Bupropion. For alcohols, amines, and alkyl halides, please specify 1°, 2°, or 3°. You do not have to identify alkane groups. . Caxer 1‘9 benzene ‘ . acid _ 0 6M» \’ l[0H I 1/” / Hacxo O / - F Lataaike»; 3° 6) NH ben'zene Cl . f Naproxen (Alevem) . Buproplon (Zyban TM) Pain and inflammation relief - anti-smoking lanti—de ressant '9 is 14%;" / as about“ Chemistry 333 Practice Exam 1 7) a) For each pair of molecules below, circle the molecule with the higher boiling point. If they have the same boiling points, circle both. 0’ {wet-P U‘fl‘fi WW M W \6/ (Pack. “WV‘EM wmiam an (as /O or Er @ Cam 80M “AW/flung; {a I ' @ W M, a b) For each pair below, circle the stronger acid. If they are the semi, circle both m m Ari“ HOY or r ®OH3 °r Ar” c) For each pair below, circle the stronger base. If they are the same, circle both. a “W ” @ 5-K @NH . | (9‘ 3 /\\/O~H or 73 do +£th 4\ or fan latch/I, Heft? O O F“, a. own-£0" CH9) HO/\/ or g (30% or qf'a'fiecbe-St'c law F F (Fair‘me N n war—i drift—Rag. ‘H or or Br 9 ’fl-e Ike-arc acid‘gé, condwshée acid, 55 cl) For each pair below, circle the molecule that is more soluble in hexane. lea 4m may,“ @NHS 0 beee- , /|\ or I HO/U\/ or Chemistry 333 ' _. _ . f I Practice Exam 1 8) a) In the space below, draw the most likely acid—base reaction between CH30H and NaNHg, showing both the reactants and the products. New -~<.. r“ Its-1? “N H' 74%) H No.69 @qu'b (plan 35” b) Label the molecu|e(s) that are acting as acids and the moleculels) that are acting as bases. c) Estimate the pKa’s of all the molecules acting as acids. (: 3 pKa units) d) Which is more acidic, te conjugate acid? e) Which is more basic, t the conjugate base? f) Which side will the equilibrium lie on (left or 9) Draw curved arrow(s) to show the movement of electrons on the left-hand side of the reaction, which will transform the reactants into the products. h) Draw curved arrow(s) to show the movement of electrons on the right-hand side of the reaction, which will transform the products back into the reactants. 9) Cross out all the statements that are incorrect. X @wis Acids accept electrons 5—fan ad" )fiThe pKa scale is based on the equilibrium of an acid with water, where (fiat water acts as an acid. “best—e f c) Phenol (CGHSOH) is more acidic than water. filth; Witt"... ' Resonance structures can be different molecules. / Cflw was, 9) esonance structures can never be transformed by breaking a single bond. “fig a. VESPR theory is based on the attraction of the attached substituents 4%4’ g) 002 is a linear molecule “Wm” M 'w'm' h) Sulfuric acid (H2804) has a Lewis structure that breaks the octet rule. i) CHGCN is an example of a nitrile. -7. Chemistry 333 I Practice Exam 1 . OMlTPl M >j1_/he C=C double bond in ethylene (CH2CH2) is made up of two pi-bonds. 95w: Io Dispersion or London forces are the attraction of two permanent dipoles. I) An alkane is an example of a hydrophobic molecule. R a 5393de W The main reason that water and alkanes do not mix because the alkanes " i r4 d n”: like the waters/fix H— I; 19-66%qu was-em Mus i+s=elR di DEL yimooiecules with very stable conjugate bases are weak acids. 77 m" Lewis bases are also Bronstead-Lowery Acids. K 995% p) HI is more acidic than HBr. 10) Give the IUPAC names for the following structures. :7: .r t 3 g“ ' lo ‘2. cf S" 7 ' ; Br c; Cl qwe—l’hdlvl-‘W'fl’fj‘ pbmmorgr-fihlcro — [fibmymo 6(3—"didfilopa H 11) Crossout the names that are improper 1|UPAC names. )(5,5~dimethyl—ootane 3 f, / 'dfwéhj‘mfgkb jer1-ethyl-1-methylpentane :2) Erwen‘rhyl Mfsve c) 1-bromo—2,6~diohloro-4-methylhexane :d:)\/2-chloro—4—methylcyclooctane @ l rah to” “2"H4‘WJ ‘ .‘5 5°” “19"”2“ e) 1 —bromo-2—chloro-1-methylcyclopropane )(2—chloro-2,2-dimethylbutane r; lam-tics mid“ 0'” “5°” an 2‘ Chemistry 333 Practice Exam 1 Periodic Table 0f the Elements I hydrogen I poor metals 5; E 7‘ 9 1O alkali metals I nonmetals E- C i N 0 F N8 I 'e I ' r - 7 . . I 12 I a kflll. -arth metals I noble gases i 13 14 15 ‘ 17; 1B : . I transition metals I rare earth metals 1 N 3E ; P S m Ag. ‘ :1 I ‘ a . | a. is M9 i 2a 21 22 _23. 24 25: 26; 2? 23: 291 an 31- 32. 33 34 Ca Sr; Ti V Cr Mnf Fe i CU GaiéGe Be : f 38i' 39 4a 41 42 43 44 45 4a: 4? as 49: so; 51 52: wa~aaaaamwammaaw ’- as 5 v2! v3 4 as as i fie ' T9 " e15 32 aa ? ‘53-'17”: Ba La : Ta ; W Re}; 03 ir Pt Au Hg Ti .Pb Bi Po' : ea 59 104‘ 1051 106 1073 103; 109 Q : vaaaeaame! . an. E1 62 ea 54 as; 66 a? as. 69 Ni ii? 9aE 91% 92 933‘ 94; 95 -. 99 100. m1 102 W nausea WWW! 35} 35 Hr ' Ki“ 53 I 54 i Xe " asi a :Rn ...
View Full Document

Page1 / 9

Practice Exam 1 (Key) - Name: Practice Exam 1 Chemistry 333...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online