GoNorth! Greenland 2010! CAAG

-ODULE s #LIMATE#ASE3TUDY
3TUDENT0AGE
C
-ATERIALS
,IPTONTEABAG
SMALLGLASSCONTAINERSEACHWILLHOLDMLOROZOFLIQUID
GRADUATEDBEAKER
TAPWATER
"UNSENBURNEROROTHERHEATSOURCE
STRAINER
COLLECTIONJARSSUCHASCANNINGJARS
0ROCEDURE
9OUWILLBEGINBYMAKINGYOURPRIMARYSOLUTIONOFAPPROXIMATELYMG,$/#
4ODOSOLABELONEJARhMG,$/#v0LACETHETEABAGINTHISJARANDADDMILLILITERSOF
BOILINGWATERTOTHEJAR
,EAVETHETEABAGINTHEWATERFORTWOMINUTESGENTLYRAISINGANDLOWERINGTHETEABAGFIVETIMES
DURINGTHETWO
MINUTEPERIOD
!TTHEENDOFTWOMINUTESREMOVETHETEABAG
.EXTYOUWILLDILUTETHISSOLUTIONTOMAKECONCENTRATIONSOFANDMG,$/#
"ESURETOLABELTHEMASYOUGO
4OCALCULATETHESMALLERDILUTIONSBEGINBYFIGURINGTHEFRACTIONOFTHEMG,SOLUTION
REPRESENTEDBYTHESMALLERDILUTION
&OREXAMPLEMG,
MG,
3OTHEPROPERDILUTIONWOULDCONSISTOFONE
TENTHOFTHECONCENTRATIONTONINE
TENTHSDILUTETAPWATER
4HISRELATIONSHIPISPROPORTIONALANDWOULDHOLDTRUEATANYVOLUME"UTTOKEEPTHINGSSIMPLEYOU
CANADDMLOFTHECONCENTRATIONTOMLOFTAPWATERTOENDUPWITHMLOFSOLUTIONWITHA
CONCENTRATIONOFMG,
.OTE 4O MAKE THE LOWER CONCENTRATION STANDARDS YOU MAY HAVE TO DO TWO DILUTIONS FIRST TO MG,
AND THEN USE THE MG, SOLUTION TO MAKE A MG, $/# SOLUTION
9OUWILLENDUPWITHSEVENJARSRANGINGFROMTHEDARKBROWNOFYOURFIRSTSOLUTIONTOCLEARTAPWATER
4SPEV,YWO]GSQ
�./-!$3/NLINE#LASSROOM%XPEDITIONS'O.ORTH'REENLAND#URRICULUM
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