EXPERIMENT4 - Mass of filter paper + watch glass 64.746g...

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EXPERIMENT #3: DETERMINATION OF A CHEMICAL FORMULA Eliot Sanford Lab Partner: Ranjita Bandi CH 1211-19 Instructor: Shashank Kulkarni Wednesday 3:00-5:50 September 26, 2007
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Experiment 4 Data and Calculations: Resolution Determinations of a Chemical Formula Atomic masses: Copper 63.45g/mol Cl 35.45 g/mol H 1 g/mol O 16 g/mol Mass of evaporating glass + watch glass 130.357 g Mass of evaporating glass + hydrated sample 130.357+1.000= 131.357 g Mass of hydrated sample + watch glass 1.000 g Mass of evaporating glass + dehydrated sample + watch glass 131.179 g Mass of dehydrated sample 131.179-131.357= 0.822g
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Unformatted text preview: Mass of filter paper + watch glass 64.746g Mass of filter paper + copper 65.254g Mass of copper 0.508g No. moles of copper 0.508*(1/63.45)= 0.01 moles Mass of water evolved 1.000-0.822= .178g No. moles of water 0.178*(1/(5*18))= .002 moles Mass of chlorine in sample (by diff.) 1.000 (0.508-0.178)= 0.670 g No. of moles of chlorine 0.670*(1/35.45)= 0.02 moles Mole ratio, chlorine: copper in sample 2:1 Mole ratio, water:copper in hydrated sample 2:1 Formula of dehydrated sample (round to nearest integer) CuCl 2 Formula of hydrated sample CuCl 2* 5H 2 O...
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This note was uploaded on 04/23/2008 for the course CH 1211 taught by Professor Foster during the Fall '07 term at Mississippi State.

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EXPERIMENT4 - Mass of filter paper + watch glass 64.746g...

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