Chem - Lab Experiment 1

Chem - Lab Experiment 1 - 1Chris Tomlinson Lab Report -...

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1Chris Tomlinson Lab Report - Experiment 1 September 18 th , 2006 Abstract : Volume Measurements and Electrolytes. Accuracy and precision are often a measure of how successful a lab went, so three commonly used measuring devices were tested to see which was the most accurate and which was the most precise. A graduated cylinder, pipette, and burette were used to measure out (what appeared to be) 10 mL of water and compare that to the weight in grams. Taking the mean weight in grams was used to determine accuracy and taking the standard deviation of each method against itself determined precision. There was a relationship between the efficiency of the device to transfer 10 mL of water and the accuracy and precision results it yielded. The pipette was closest to 10 mL mark (over by .0402 g) and also deviated the least (.0902 g.) from its readings. The more accurate the device is directly effects how precise the device is as well. Several solutions were tested to provide information about their conductivity of electricity in water. A pure water solution, a salt solution, and a sugar solution were all tested using a lightbulb conductivity tester to determine which, if any, solution was able to conduct electricity. Adding the ionic compound of salt to water was the only solution to work, lighting the bulb. Covalent bonds of sugar were a poor conductor, as was pure distilled water, showing that
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This note was uploaded on 10/24/2008 for the course CHEM 1 taught by Professor 1 during the Fall '08 term at Rowan.

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Chem - Lab Experiment 1 - 1Chris Tomlinson Lab Report -...

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