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Preparing and Analyzing a Compound
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| Submitted: Sun Dec 15 2002
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Tare-sang Nam Chem 101 10/23/02 Lab #6 Preparing and Analyzing a Compound Part 1 Summary of Data The initial mass of BaCO3 in the vial: 21.934g The final mass of BaCO3 in the vial: 14.526g The total amount of BaCO3 transferred into the 250-ml beaker: 7.408g The mass of a piece of student grade filter paper on the large watch glass: 34.660g The mass of the BaCl2.2H2O crystals /filter paper/watch glass: 39.117g Calculations Discussion 1) The method of dissolving BaCO3 in water is not sophisticated enough to make the chemical reaction that yields barium chloride, 100%. 2) The lab manual says, "you do not want to use up the BaCO3 entirely so when the mixture doesn't fizz very much and has a small amount of solid (a good, healthy pinch) on the bottom, stop adding acid," which implies the incomplete chemical reaction that results in a low percent yield. 3) In the first filtering process, some of the ions do not pass through the...
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