Experiment 3 - Lapchak 1 Stephen Lapchak Ben Rauch...

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Lapchak 1 Stephen Lapchak Ben Rauch Chemistry 1A Lab 17 October 2009 Experiment 3: Analysis of Water The purpose of this experiment was to use chemical and physical tests to determine the concentration and types of dissolved solids in tap water, ocean water, and deionized water, to recognize and use terminology common to solutions, and to provide an introduction to solubility rules for ionic compounds in water. The purpose of the analysis of water by physical change was to discover the percent totals of solids and parts per million that were in both tap water and ocean water. In order to calculate the percent totals, a beaker, that was dry and untouched by hands to prevent the oils from skin affecting measurements, had 2-3 boiling stones placed in it and was weighed. 75.0 mL of ocean or tap water was then added to the beaker and also weighed. All the water in the beaker was then boiled away, leaving residue behind. The beaker was then placed into the heating oven to thoroughly remove all water. Finally the beaker was then weighed again
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