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Exp. 2 - Course Chem 221 Name Ashay Mehta Experiment#2...

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Course: Chem 221 Name: Ashay Mehta Experiment #2 – Determination of Sulfate as Barium Sulfate Using Gravimetry Unknown Number: #225 Due Date: 9/25/09 Date Report Submitted: 9/25/09 Grade: Accuracy Presentation Total
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Determination of Sulfate as Barium Sulfate Using Gravimetry Ashay Mehta September 24 th , 2009 Objective: To successfully determine how much of the sulfate is actually barium sulfate by quantitatively using the gravimetry setup. Theory: In this experiment, we are looking at the precipitate that is formed which is barium sulfate. A precipitate is the solid formed after the reaction has occurred. The mother liquor or the supernate that is left is used to get the residue of the precipitate out of the crucible. Procedure: First, I treated the crucible with HNO3. After that, I heated up the crucible for 10 to 15 minutes until the bottom of the crucible was glowing red. Then I let the crucible cool down for 30 minutes in the desiccator. Then I weighed the crucible on the analytical balance to 4 decimal places. Then I repeated that procedure again and made the
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