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Unformatted text preview: to be 1.74 M, (moles/liter), 1.73 M and 1.75 M. The average of these numbers is 1.74 M. This result is extremely precise, but suppose the chemist is not a very good chemist and made the same mistake in all three experiments: the true concentration of the chemical in solution is 2.32 M. Even though this experiment was done three times, and the concentration was determined very precisely, it is not an accurate result. Now let's say that another chemist performs three more experiments to determine the concentration of the same chemical in solution, and finds the following values: 2.87, 1.48 and 2.61 M. When averaged, these values accurately give 2.32 M, but the experiments were not precise. In fact, it may have been lucky that they averaged out perfectly....
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This note was uploaded on 11/14/2011 for the course CHEM ch 101 taught by Professor - during the Fall '10 term at Montgomery.
- Fall '10