ucsb - chem 1a - lab 3 discussion

ucsb - chem 1a - lab 3 discussion - was divided into...

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Lab 3: Analysis of Water – Discussion In this lab, we were expected to determine the concentration of dissolved solids, as well as identify them, in tap or ocean water by using chemical and physical tests. The purpose of the physical change test was to determine the percentage of total dissolved solids in tap water. The test was conducted by evaporating the water in a beaker, leaving only the dissolved solids behind. It was concluded that a sample of tap water would be two to four percent of dissolved solids, as opposed to ocean water, which was nearly double (according to data results); in other words, ocean water is far more hazardous drinking material. The chemical change test was designed to test for dissolved solids. A sample of tap water
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Unformatted text preview: was divided into several beakers, each testing for a different solid by adding another chemical to check for precipitation. Each tested chemical turned up positive (see data table, part 2 for balanced equations); in other words, tap water is also hazardous to drink, so everyone should drink apple juice. Overall, the lab consisted of time consuming and tedious testing that is typical of chemistry lab experiments. It was comprised of mostly waiting for water to evaporate, and then weighing or adding chemicals. To my knowledge, no errors were made on our part, but improvements in multi-tasking and time management can be made....
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