template_exp_2 - NAME and ID Number: Quiz Section: LAB...

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LAB PARTNER: Quiz Section: EXPERIMENT 2 I. IDENTIFICATION BASED ON PERCENT METAL COMPOSITION DATA I. Magnesium Mass of empty crucible and cover: 21.400 g Mass of crucible, cover, and Mg: 21.533 g Mass of Mg: 0.133 g 1 pt Mass of crucible, cover, and product: 21.624 g Mass of product: 0.224 g II. Copper g Mass of crucible: 12.659 g Mass of crucible and sample: 13.645 g 1 pt Mass of sample: 0.986 g Mass of crucible and product: 13.340 g Mass of product: 0.224 g Mass of crucible : 21.875 g Mass of crucible and KCl/KClO3 mixture: 22.865 g Mass of KCl/KClO3 mixture: 0.990 g 1 pt II. DETERMINATION OF PERCENT KClO 3 IN A KClO 3 /KCl MIXTURE III. KCl/KClO 3 mixture Purpose and Method In this experiment, Mg is strong heated until it fully reacts with a component of air (oxygen or nitrogen). Explain how percent Mg is determined. Also explain how percent Mg is used to distinguish between MgO and Mg 3 N 2 . (2 pts) How is percent Cu determined in the copper carbonate hydroxide compounds? (2 pts) How is percent KClO 3 in a KClO 3 /KCl mixture determined? (2 pts) Grading This template = 30 pts Lab Notebook = 5 pts By signing below, you certify that you have not falsified data and that you have not plagiarized any part of this lab report. Signature:
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This note was uploaded on 04/07/2008 for the course CHEM 142 taught by Professor Zoller,williamh during the Fall '07 term at University of Washington.

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template_exp_2 - NAME and ID Number: Quiz Section: LAB...

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