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11 Nov 2019
Most values measured in a physical chemistry lab can be compared to accepted literature values. This comparison provides feedback about the accuracy of your results Evaluating the quality and reliability of your data can also lead to improvements in technique. Types of Errors _____ 1. Errors such as spilling sample or incomplete collection of a precipitate 2. Fluctuations in data: cannot be corrected 3. Consistent errors that are reproducible when the experiment is repeated, can be corrected 4. Error caused by fitting data using a model that does not accurately describe the system a) Random Errors b) Model Error c) Blunders c) Systematic Errors Suppose that in a gravimetric analysis, you forget to dry the filter crucible (shown in the picture below) before you start collecting the precipitate You filter the product, dry the product and crucible thoroughly in an oven, and then weigh the product and crucible. a) The reported mass of the product is considered to have what type of error associated with it: systematic or random error? b) Will the measured mass of product be too high or too low?
Most values measured in a physical chemistry lab can be compared to accepted literature values. This comparison provides feedback about the accuracy of your results Evaluating the quality and reliability of your data can also lead to improvements in technique. Types of Errors _____ 1. Errors such as spilling sample or incomplete collection of a precipitate 2. Fluctuations in data: cannot be corrected 3. Consistent errors that are reproducible when the experiment is repeated, can be corrected 4. Error caused by fitting data using a model that does not accurately describe the system a) Random Errors b) Model Error c) Blunders c) Systematic Errors Suppose that in a gravimetric analysis, you forget to dry the filter crucible (shown in the picture below) before you start collecting the precipitate You filter the product, dry the product and crucible thoroughly in an oven, and then weigh the product and crucible. a) The reported mass of the product is considered to have what type of error associated with it: systematic or random error? b) Will the measured mass of product be too high or too low?
Lelia LubowitzLv2
17 Jun 2019