322A Lab Quiz 1 Spring 2005

322A Lab Quiz 1 Spring 2005 - CHEMISTRY 322aL/ j:l.l r«L...

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CHEMISTRY 322aL/ j:l.l r«L 8PRI!~ 200'5 FIRST LAB QUIZ (.uf-fw. - ~II oS' By ~ NAME, _ 1. (~2) KEY -- 2 . (12) Lab time. _ 3. (1.2) _ T.A . _ 4. (10) _ 5. (9) _ This test comprises this page and five numbered pages. TOTAL (55) _ If a question says to answer in fewer than a certain number of words, DO so. Deduction for wordiness.
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- 1 - IJ 1, ~ /~ \ .. :., ca;f 1. (2) A 24/40 male (inner) standard taper joint (like that ~~~~~1 lower end of your reflux condenser) is made of glass 2.0 ~ thick. Calculate its out~ diameter (00) at its na~ end. \~170 Jtic~~ ~~ J-~ - 4 (~i.f ~ Vl q V Y Q ---;;;;:~---==-=- .L. .l -:::!!? ~ -:: (?-~ - 'f- }~lM "1;)eJ t11. WI 2 2. (2) An a-rom ID O-ring just fits in a groove of OD = 11 mm. Calcu- late the O-ringls thickness. g: "\ -/ /r--. w1rLft. .. 1 O-v-lIA-J. cA % Mill ,~~ z: l .. rM~. ~ ~ ~O -{ 0/ w ce: rf2t l' C~ c I' f\.U- K "'f e e. ...J, 3. (2) A bulk grade liquid sample shows moderate absorption at 3400 G 1 em-I. After treatment with anhydrous CaC1 2, the 3400 em- abSOJ:Pti011 is very weak. Explain in < 12 words. C .. .d 1- vf '/"'y ~'j &t M-""4J iJ~ cJ]; :>fOD Z II-t ~r o'fJ- W~ ~ It, wJ~· 4. (3) An aq soln made up from 15.0 mL isopropyl alcohol (IPA, densi- ty = 0.78 g/mL) is "salted out". The upper layer weighs 12.0 gi its density corresponds to 75 wt 'IPA. Calculate what fraction of the original 15.0 mL IPA is in the upper layer. M <>.M 1- r' V\.1l'~ rr»> rs: .... L. 'r 0.1! 1/ .... L := 1/.1a-' I?-J UL ~ 7~~t) 1: I A- -=;> ~- 0 J __ ~-.:"'~U~l:. .:-. -----:I .. y ~T1fo (0. II} J IL 1 __ --=- __ -----
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322A Lab Quiz 1 Spring 2005 - CHEMISTRY 322aL/ j:l.l r«L...

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