exp02 - Experiment #2: Separation and Analysis of a Ternary...

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Experiment #2: Separation and Analysis of a Ternary Mixture xxxxxx 9/27/2006 Section x Purpose The purpose of the lab was to separate three individual materials from a mixture of solids. We then needed to find the percent mass composition of the mixture. Experimental Methods To begin the experiment we first put the empty crucible over the Bunsen burner so that any impurities could be removed. After letting it cool, the empty crucible had to be massed. While on the scale, we added as close to 2g of the mixture as possible. The mixture included sand (SiO 2 ), salt (NaCl), and NH 4 Cl. We put the crucible back above the Bunsen burner in order to sublime the NH 4 Cl in the mixture. The crucible and mixture without the NH 4 Cl was then weighed. Now, only salt and sand remained in the mixture. To isolate the sand, we did a triple wash with distilled water: each time with 5ml. The salt completely dissolved in the water, leaving us only sand that we needed to decant. In order to have somewhere to put the salt water solution, we massed another crucible, this time with a lid. We carefully decanted the sand by pouring the salt water into the second crucible. The sand in the first crucible was then massed. Since every
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This note was uploaded on 03/31/2008 for the course CHEM 01 taught by Professor Kryatov during the Fall '07 term at Tufts.

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exp02 - Experiment #2: Separation and Analysis of a Ternary...

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