University of Washington CHEM 162 Chem 162 - lab 4

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Name: Jordan Martel Quiz Section: CH Assigned ID Number: 1666548 Lab Partner: Emerson Points Grading: 60 pts (10 pts notebook, 50 pts template) 10 A. Starting Components (Fract. Crystallization #0)... data entry 3 Step 3: Mixture before first crystallization 3 mass KNO3 4.470 g mass (NH4)2Fe(SO4)2.6H2O 0.588 g Total mass of the sample mixture 5.058 g % Impurity (i.e., % Fe compound in the mixture)* 11.63 % *(This is your % impurity for Fract. Crystallization # 0) Fract. Crystallization #1 Step 7: mass of dry filter paper + watch glass 63.126 g Step 10: mass of KNO3 crystals + filter paper + watch glass 66.717 g mass of KNO3 crystallized 3.591 g % KNO3 recovered (% of KNO3 in Step A.3.) 80.300 % 1 Step 11: mass of KNO3 crystals to be analyzed for purity in Part I.C 0.102 g B. Fract. Crystallization # 2 (Re-crystallization) Step 5: mass of dry filter paper + watch glass 63.128 g Step 7: mass of KNO3 crystals + filter paper + watch glass 65.056 g mass of KNO3 crystallized 1.928 g % KNO3 recovered (% of KNO3 in Step A.3.) 43.100 % 1 Step 8: mass of KNO3 crystals to be analyzed for purity in Part I.C 0.405 g Chem 162 - Experiment #4 I. Fractional Crystallization of KNO3 with (NH4)2Fe(SO4)2·6H2O Impurity II. The Solubility Curve of KNO3 DATA, CALCULATIONS, AND GRAPHS 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 result in 5 points being deducted from your report score. Signature: Note: All sections of this report, except the structural formulas, must be typed. Part I: Fractional Crystallization of KNO3 with (NH4)2Fe(SO4)2.6H2O Impurity 1 This study source was downloaded by 100000793680026 from CourseHero.com on 05-10-2021 14:28:52 GMT -05:00 https://www.coursehero.com/file/36915424/Chem-162-lab-4pdf/ This study resource was shared [Show More]

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