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Unformatted text preview: Name: Qz Section: Lab Partner: Grading: 60 pts Assigned Points 5 5 A. Starting Components (Fract. Crystallization #0) Step 3: Mixture before first crystallization g g Total mass of the sample mixture g % Impurity (% Fe compound in the mixture) % 1 (This is your % impurity for Frac Crystallization # 0) Fract. Crystallization #1 Step 7: mass dry filter paper g Step 10: g g 1 % 1 Step 11: g B. Fract. Crystallization # 2 (Re-crystallization) Step 6: mass dry filter paper g Step 8: g g 1 % 1 Step 9: g mass KNO 3 mass (NH 4 ) 2 Fe(SO 4 ) 2 . 6H 2 O mass KNO 3 crystals + filter paper mass KNO 3 crystallized % KNO 3 recovered (% of amt in Step A.3.) mass KNO 3 to be analyzed for purity (~0.1 g) mass KNO 3 crystals + filter paper mass KNO 3 crystallized % KNO 3 recovered (% of amt in Step A.3.) mass KNO 3 to be analyzed for purity (~0.4 g) 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 and that you have not plagiarized any part of this lab report. Failure to sign this declaration will cost you 5 points....
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This note was uploaded on 05/08/2008 for the course CHEM 162 taught by Professor N. during the Spring '08 term at University of Washington.
- Spring '08