Chem Lab 6

Chem Lab 6 - determined that the only way to measure the...

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Investigation 6 Justin Benson CHM 113 Lab TA: Jeanette Nangreave Group 1 Conclusion In conclusion, our goal of forming the four precipitates given: AgCl, BaCO 3, NaCl, and Al(OH) 3 was successful in all but one reaction. AgCl, BaCO 3, and NaCl formed noticeable precipitates. While Al(OH) 3 reacted and formed a cloudy liquid, our experiment did not produce a precipitate even after the centrifuge there was no visible change. Group 3 used filtration and discovered a .1g of Al(OH) 3 so we used their results to aid in our own conclusion. We also determined that the reaction of HCl + NaOH NaCl + H 2 O is deceiving because when you mix the two substances together, it looks like there is no reaction what-so- ever. This is because NaCl and H 2 O are the products and NaCl is water soluble. So we
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Unformatted text preview: determined that the only way to measure the amount of precipitate in the reaction was to get rid of the H 2 O through evaporation by boiling a small amount of the mixture; therefore, leaving only the NaCl. Measurements may not be exact because of variables such as: precipitate being sucked through the filter paper, or not being able to retrieve all of the precipitate from a test tube. Our error in the reaction of Al(OH) 3 was the amount of time we had left because we only had time for one attempt at separating the precipitate. If more time was allotted, we could have used multiple methods for each reaction and compare the results of each to present a more accurate amount. However, our restriction of lab time hindered us from such a detailed experiment....
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