lab 2 postlab

lab 2 postlab - This question will involve error analysis....

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This question will involve error analysis. In the following table, enter the values called for from your experimental results. Then calculate the percent error for the differences between the values you obtained for the solution of unknown concentration in Part A, and the results you obtained in Part B and Part C. The equation for percent error is: % difference = ((theoretical value - actual value) x 100%) / theoretical value. A percent difference can be positive or negative. Treat the concentration you measured in Part A as the theoretical value, the one you're trying to match. TABLE A. Error analysis for copper(II) sulfate solution preparations. Absorbance at 620 nm, AU* % Difference from Unknown Concentration of Cu 2+ , M % Difference from Unknown Unknown, Part A .222 .0996 Solution from solid .166 25.23 -.0120 112.05 Solution from stock solution .171 22.97 -.00200 102.01 *AU = absorbance units The absorbances and concentrations will be counted correct, but will not receive points. They were accounted for in your lab report. Why would you expect the % differences for the absorbance to be similar to the % differences
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This note was uploaded on 03/18/2011 for the course CHEM 202 taught by Professor Feducia during the Spring '09 term at N.C. State.

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lab 2 postlab - This question will involve error analysis....

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