Experiment 5

Experiment 5 - Experiment 5: Gravimetric Determination of...

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Experiment 5: Gravimetric Determination of Sulfate Jake Sieger Chemistry 121 10/27/11 T.A. – Teodora Zujovic Purpose : The purpose of this experiment is to determine the percent sulfate in a sample using a semimicro scale gravimetric procedure.
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Procedure : Refer to pages 41-42 of General Chemistry Laboratory Experiments, Volume 1 by Robert Tatz and Judith Casey, Hayden-McNeil Publishing 2012. Report Sheet : See attached report sheet. Report Questions : 1. A) If an insufficient amount of BaCl 2 was added the percent sulfate would be higher than the value if the procedure was done correctly. This is because there would not be a proportionate amount of BaCl 2 in the solution to determine the right percentage of sulfate. B) If the addition of an acid was omitted from the experiment the salt precipitate would not have been able to form, which would lower the value of sulfate. This is because in an acid base reaction the product is always going to be a salt and water. C) If the precipitate was not washed during the experiment the solution would not
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Experiment 5 - Experiment 5: Gravimetric Determination of...

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