WSU CHEM 106 - Prelab- Kinetics 1 (2 pages)

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Prelab- Kinetics 1



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Prelab- Kinetics 1

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Pages:
2
School:
Washington State University
Course:
Chem 106 - Principles of Chemistry II

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Han 1 Dalila Han Chem 106 02 1 30 17 Kinetics 1 Prelab 1 The initial slope is obtained by drawing a tangent at the origin of the graph provided The slope equals the difference in y axis difference in x axis The calculations are 92 35 1 9 07125 mols liter 2 From the plot of concentration vs A the slope is 540 min Absorbance is A ebC e molar absorptivity coefficient b path length C concentration rate of absorbance is measured by A 54 min and 54 383 1 rate of change in concentration rate of change in concentration 54 383 M min 00141 M min 3 Numbers 3 and 4 are coefficients of A B and C in the reaction given dA dt 6 5 10 2 M sec dA 2dt dB 3dt dB dt 6 5 10 2 3 2 9 75 M sec dA 2dt dC 4dt dC dt 6 5 10 2 4 2 13 10 2 M sec Han 2 4 To determine the rate for the reaction crystal violet with sodium hydroxide numerical measurements will be taken to estimate its activation energy The spectrophotometer is used to determine where the wavelength of Crystal Violet most strongly absorbs at The colorimeter will then calibrate it Three test tubes will be used for NaOH DI water and Crystal Violet each of which will contain specific amounts of liquid added to it By using the Logger Pro all the absorbance measurements needed will be taken



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