Chem162_FractCryst_Report_032410

Chem162_FractCryst_Report_032410 - Name & ID: Qz Section:...

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Qz Section: Lab Partner: Assigned Points Grading: 60 pts (5 pts notebook 55 pts template) 5 5 5 A. Starting Components (Fract. Crystallization #0) Step 3: Mixture before first crystallization g 0.5 g 0.5 Total mass of the sample mixture g % Impurity (% Fe compound in the mixture) % 1 (This is your % impurity for Fract. Crystallization # 0) Fract. Crystallization #1 Step 7: mass of dry filter paper + watch glass g Step 10: g g 1 % 1 Step 11: g B. Fract. Crystallization # 2 (Re-crystallization) Step 5: mass of dry filter paper + watch glass g Step 7: g g 1 % 1 Step 8: g mass KNO 3 mass (NH 4 ) 2 Fe(SO 4 ) 2 . 6H 2 O mass of KNO 3 crystals + filter paper + watch glass mass of KNO 3 crystallized % KNO 3 recovered (% of KNO 3 in Step A.3.) mass of KNO 3 crystals to be analyzed for purity in Part IC mass of KNO 3 crystals + filter paper + watch glass mass of KNO 3 crystallized % KNO 3 recovered (% of KNO 3 in Step A.3.) mass of KNO 3 crystals to be analyzed for purity in Part IC EXPERIMENT 4: I. Fractional Crystallization of KNO 3 with (NH 4 ) 2 Fe(SO 4 ) 2 .6H 2 O Impurity II. The Solubility Curve of KNO 3 DATA, CALCULATIONS AND GRAPHS Part I: Fractional Crystallization of KNO 3 with (NH 4 ) 2 Fe(SO 4 ) 2 . 6H 2 O Impurity PURPOSE AND METHOD Part I Part II By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that all calculations and responses other than the reporting of raw data are your own independent work. Failure to sign this declaration will cost you 5 points. Signature: Note: All sections of this  report must be  typed.
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C. Analysis to Determine % Impurity (Iron) First Crystallization Step 3: 1 What is your absorbance after dilution? (if applicable) Multiply your absorbance by the dilution factor (if applicable)
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This note was uploaded on 04/11/2011 for the course CHEM 162 taught by Professor N. during the Spring '08 term at University of Washington.

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Chem162_FractCryst_Report_032410 - Name & ID: Qz Section:...

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