lab report
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access your subnited spreadshea via Blackboard (Cl-Ellllm. My Grads)
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assssedfororiginality. YouuiInotseeIIatoriginaIityReportmtiyoureoeiveIIe
feedbadtandrlwtfromtheleport.
PROCEDURE
A:lleasw’I\gCharacte¢isticAbsotp6onSpeci’a
1.!-”IIacuveItewihdistiIedwaer.Placeiti1the
spectruneter.makirIgsuefl1athedear.non-fmstedsideis
facingtheightpaIh.oollectareietenceor’blaflt”
-7-. spectnun. The dasotbanoe of the water wi be subtraded
73″!-‘°39″‘9″“5’:::fls E autnmaicaiyfromlaeneacfngs.
Espaueaimouu.-ea § 2. hasepaatewve1T1:e.a:Iectruy1ly3fIl:f’~4be2x1Q;:
eoIIpanIInntlIaydanage ‘ KJLhO4sclutnorL prectseconcentranon pn
itheslledlollllofiotmhf. I ontheld3eLPlaoe1hisi1thespe<1rometerarIdmeasure
L-J the absorbance spectnm Record this spectrun in you
resultssheet.De!enIi1ethevtave!eng1h\vheI’ed:sorbance
isatamaxirlum
B: Dehnlfisatiotuoftllestoicllioutnetlyofleaclion.
1. From1I1eaLtxnaticdispenser.measuIe25Irtvolumesof
1MH2Soa(aq)inbead1often 1OIrtplasticFdcon”‘
tubes.La:eleadIoffl1eubeswiIhthenunIbess1fl1t’ouy\
11010.
2. hbeachtubeadd25Irtofpatassiumpenna19anate
scution
3. Nonptepa’eaccuatelyasduionofsociLtnpemarbonahe
(Na,CO,-1-5!-l,0,)bg’veasoulionarourId4mMi1l-1,0,
Usean analytical balawceand volumetric glasswate. Using
cisIiIedwaer.ciuethesolution‘nfl1eIlaskLpbthemark.
shopperaudnixwelbyhverfngflweflaskaleastifltinles
‘l’hisisyoustndtsolutiorL
4. Dimeyourstod:solu1ionusinga1iI5diuiontomakea
toIalvouneof25nI.111isisthesolmioI1youwilIusefor
thenextslaep.
5. Totheplasticfilconttbesadd Iespeaive!yo.D.5. 1.1.5.
2.25.3.3.5.4and4.5IrtofyourciIutehyIio9enpemadde
sch:tiorLUsingadistiIledwaerbcl1le.adddistied\vaIIerto
ead1tubeuptothe1oIrtmadt.Ioixthesolmions
thorotyaly.
6. UseacolotinetercorI1ectedtoaVemierLa:Qaestto
measuretheabsorbaneeofeadasolutionatflweavaiable
wavelength dosesttothernaximumthayou detemiwed
earlier.Usethetnnanuwkeysbselectthiswave!eng1I1.
Beforetak’nganyreaci19s.youwilneedtoblaritthe
cclorirnemerbyplacirlgacuvedtefiledvaihwaerinthe
cclorirneoer.dosingthelida1dpressiIgthe‘CAL’buIbn
mtitheredLEDigflbeg’1stoflasha1dthenreleasingi.
Thecolotineterisruawreadyformeasuringthedasorbarxoe
vahesofyoursolmion.
Experimental Procedure . . I
1. To deternI’nethestoichionIetIyofthet’eoctiorIbetweenHzOgaId
MnO4‘ by measuring the of several solutions of varying V”
ooncentrofionofl-lgO;audconst¢rIt[MlO4‘]at52OunusiIgaUV-Vns .__r
2. To detennine the concentration of hyckogm peroxide in a Iandry powdr using
grqahicnlmethod
C: DeoemilulionofSodilnpe¢cxbonaeconcettrationbyPemu1galute
Andysis
Steps11-12dmldbepafamedhMp£aale(3idaI6calmdyaespabnneda’deby
aide).
Rananber-so¢iumpacarbauoeisaskiIirribnt-wearahbwaluycoagsafety
yassesanddisposablegloves!
Weighana:u:ahetyi1mabeaka’asnaIarn1ndbIead1pouda’(O.3-O.4)arK!
reootdtheweigfl.
Add1MstluicaddsduimumiIhefizirIgoeases(atund3nt)1TIisisneededto
nemraisethebaseptesem.
l)ih:heIffisacauaIelyuo1oonLinawlumIelricflaskwi1hdsfiIedwaet.
Malxeaseomd<flI16mbyacarahelydilulivg1nLdyu1rfirstsoh16<xm:25nL
PIepaIeIhtee1orrtplasIictubes\uih2.5nI.1Msdfuricacidand2.5trtpot3ssi:n
pem1a1ga\atesduimasbeRxe.Toead1ubeadd1nLdytxtdIuedblea$Ipoudet
solu6m.MakeLpblhe1Ontnwkwi1h<isIiedwaeta1dnixflu’uJyiy.
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fmmyxxtpreviousplot.
Cal¢alaelhecaucenu’aionofhydu9enpemuddei1youunsolufions.
Cdalaememnterdnnlesdhydogenpeozddehmeacfiveoxygenhuudrypouder.
WoIkoutIhe%byrIassafNa¢Oos-1.5H2O2intheIaurK!rypouder.
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