Chem 1a Lab Week#3

Chem 1a Lab Week#3 - Derek Clary Chem 1A Lab Ta: Ryan-Th...

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Unformatted text preview: Derek Clary Chem 1A Lab Ta: Ryan-Th 6-850PM 10/20/10 Discussion There were three purposes to this experiment: to use chemical and physical tests to determine the concentration and types of dissolved solids in tap water, to recognize and use terminology common to solutions, and to provide an introduction to solubility rules for ionic compounds in water. In the first section of this two part experiment, we analyzed water by physical changes. The test was conducted by measuring 75 mL of tap water and pouring it into a completely dry beaker. To make sure there was no moisture on the beaker already to affect the weight, we put it in the oven for 20 minutes; when we took it out of the oven we did not touch the glass with our hands to avoid the oil transfer. Next, we added 2 boiling chips to the water and boiled the beaker over a Bunsen burner. At each different stage (empty beaker, beaker with water, and beaker with water and stones) we weighed the beaker. Once the water was all evaporated, we weighed the left over solids in the beaker and calculated he percent total solids in...
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Chem 1a Lab Week#3 - Derek Clary Chem 1A Lab Ta: Ryan-Th...

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