crystal violet lab

# crystal violet lab - Michelle Duan Crystal Violet Lab Post...

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Michelle Duan Crystal Violet Lab Post lab questions: 1. The reaction was second order with respect to the concentration of crystal violet because the R 2 value is closest to 1 with the graph of 1/[Abs]. The others come close at . 912 and .944, but second order is better at .967. 2. Calculate the rate constant k, using the slope of the linear regression line for your linear curve. k = 0.1624 3. Write the correct rate law expression for the reaction, in terms of crystal violet (omit

Unformatted text preview: OH-). Rate = k[ C25N3H30Cl] 2 4. Using the printed data table, estimate the half-life of the reaction; select two points, one with an absorbance value that is about half the other absorbance value. The time it takes the absorbance (or concentration) to be halved is know as the half-life for the reaction. Half life = roughly 32 seconds This was calculated with the line’s equation on the graph because the reaction had not long enough for there to be enough data....
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• Fall '12
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