2009 Ochem Lab Exam 1

2009 Ochem Lab Exam 1 - (182 M ultiple Guess A W hich c...

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(182 Multiple Guess ' A. Which compound would h(lve the l(ltgest RFV<llue? o ~OH B. Whllt is the tellson fot MgS04 being used in lln experiment? aJ As II drying (lgent to remove tr<lce (lmounts of wllter from lln org(lnic solvent. 't( During extr<ldions, it pulls wClter molecules From the org<lnic IClyer <lnd helps force the o rg<lnic compounds into the orgClnic l<lyer. c. To sepClrClte the org<lnic compounds the inorg<lnic sCllts. d. To convert the benzoic Clcid to benzollte ion, which pClrtitions into the llqueous IClyet. C. A mote poillt solvent in TLC cquses highet Rr eClsier visUCllizCltion of spots JI- D. With K = 15, how much B is exttllded llsolution of10.o 9 ofB in 100. mL ofwllter by one w(lsh with 10.0 mL of ether? 1 6--:. 10 4- x I COML I, >( \ DW\L 8.o0g 7.o0g 5.00g E. The multiplicity of the sign(ll tesulting the undetlined ptotons in (CH 3 hCQ:!.(CH 3 h triplet qUllrtet quintet F. solvent pClit thClt could not be used fot recrystClllizlltion. h""'lne, ethee h""'lne , acetone ~ h""'lne , ethyl acetate G. Which the follOWing h<ls gteCltest polClrity? methanol ~ W<lter Choosing <l solvent for tecryst<lllizlltion, ide<llly the produd should be ____ _ <l. Soluble in the solvent ~ H. b. More dense th<ln w<ltet Insoluble in the solvent @ Soluble in the solvent only when hellted
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r-- - 19 I. Which 2 protons qre in the Sqme chemicql environment (qre chemicqlly equivqlentH iv H 0 k i::*> H iii i qnq ii iii qnq iv iqnqiv Shott answer A. (8) A TLC WqS qone on some of the frqdions from q column. - solvent front CmpqA •••• 0 0 Cmpq B 0 0 0 0 0 0 -origin 3 6 9 12 15 18 21 24 27 30 33 36 q) Bqseq on this informqtion, whqt frqdions shoulq be combineq to recover pure Cmpq 9/ A? " /- IrA 1 b) Bqseq on this informqtion, whqt frqdions shoulq be combineq to recover pure Cmpq ry B? ~4 - ~O c) Shoulq more frqdions be checkecl by TLG If 50, which ¥Iclitionql frqdions woulcl you ( check? DO N0T LlSTALL OF TH EM . . . BE LOGICAL. JJ;( J ~ I 1"4 J I (tJ ,/1 j 2- ~ ~ 3 cI) Cqlculqte the Rrvqlues for these two compounqs.
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This note was uploaded on 03/25/2012 for the course CHEM 3112 taught by Professor Staff during the Spring '11 term at Oklahoma State.

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2009 Ochem Lab Exam 1 - (182 M ultiple Guess A W hich c...

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