CHM 121L QUIZ 2 - I ’[r(“M t.‘H Nunr ¥ K r In”...

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Unformatted text preview: I ’ [r (“M t.‘H Nunr: ¥ K r. In” 71!]! ()Hl/ t«’.' q I (‘1 pt'.) Att'-t;1,.1 utmtcntmt'HH I?”,\‘nl‘ii‘lptHHj"-‘-ithitt‘-‘-L"1}ITIIHIIXKTVKW‘K x (ft/HI. “w h! the, prmnun “I the mcnlauy. when ‘he tum ,t'mcd the “(‘[Htit n ;‘ hhmtn twhm She tn until! the volume ml nut-er nhc ttqn‘vzteztcd m, 3” I‘d. Uz‘ h'J (Lllil pnyc What mural-eh) dud ahc make, It utt)‘.w t We?" ‘ l r' ~' ‘ L ‘ "‘ ‘(C'r‘ ,l r‘r(f .. , A,“ ‘1 l . l ‘, '1 t , ‘r ( {ff‘v ' ‘ v ' a 7 ~ / rt v L7,» 2. (l; ptx) 'thc dcn'uly ohm unknown liquid X was determined by first weighing an empty 50ml, hcukcr. ’l he weight oflhc empty beaker was 67.] 19g. Twenty mtlhhtcrs of X was then pipeth into the beaker and weighed again. The beaker with X \Vctt,'ttt'(182.x39g. Determincthc density ofX to the correct significant figures. Show your calculations. Pr " ' ‘1' ‘1 fl!‘ YR . ' ,l t J. A ' h - ‘bttt'q V'A 3. (6 pt.) Define the [Allowing terms. .'l. Accuracy: 1"! ‘.(')I(‘ “_\’,".~)l fr n \I". 3‘ ‘3 l ‘( -\ .N‘ ‘IV \“ H“ (‘Htmd I h. Precision: *» “w (nor-M. \.'f"‘"( (4 - r» ~. ;s"‘ \- “y «z‘ {at ' m my v ufl ur'lpt 4. (4pm) h) today 5 experiment you are gomg to synthCSIze alum. Name any two uses of the compound, as described in the lab manual i. ”1‘ :l-l‘ :5 "'3 J: s A” dcicx'n'nnaiinn cmcrimcm vou uscd 1W0 picccs ol‘cqmpmenl Io catsuit truss. the :nah'tical balancc and ihc triple beam bnlnncc. You also USCCl ‘ A'o minim: "s o .‘ncasurc volume, ihc pipcile and the graduated cylinder. Which "3:9 as“: “" ’ 7: less easily: in measuring mass and volume rcspcctively? ' N ‘7‘ I '1 hi:- ;,h‘/~Q\'.LL 513, mL 0: 91 pm My; ccc “my; /' 9‘ .312“: l.‘\‘l; Ting}. five) \:i¢“\L -‘ 2’, today you has been given ihe following precautions in the '3 :‘vf- - r,—-:.~-,-\.-¢~ fi-3l ‘\’A v)‘."\.;i.l.‘\,ll«\ . . in your la manuals. Explain lhc reasons for the warnings? .l_.‘:‘.. J. .f-fi “ . k \\-\4. s. 1.5: beaker-s bubbling \R'ilh hydrogen inside the hood A /s\ bk ('0! “.ifi‘ 3kg, \:.u\:\,T\L_ mrsu \‘(\\h‘ “»—k \ucdw M overhcming and too much evaporation when using a Bunsen burner. l ,"J FAN.- ...
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