Chem162_Kinetics_Report_032410_000

Chem162_Kinetics_Report_032410_000 - Page 1 of 11 Name and...

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Unformatted text preview: Page 1 of 11 Name and ID: Quiz Section: Lab Partner: Grading: 60 pts. (Lab notebook pages are worth 5 pts - total for report and notebook is 65 pts) Experiment 2: Chemical Kinetics Part I: A Clock Reaction Part II: Crystal Violet-Hydroxide Reaction Note: All sections of this report must be typed. By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that all calculations and responses other than the reporting of raw data are your own independent work. Failure to sign this declaration will cost you 5 points. Signature: Purpose and Method Part I: Clock Reaction (3 pts) (purpose, reactions/rate law, method) Part II: Crystal Violet-Hydroxide Reaction (3 pts) (purpose, reactions/rate law, method) Page 2 of 11 Stock Solutions Soln. Conc. Units HCl Experiment Test Tube #1 Test Tube #2 Temp. Run Celsius Time Rate # mL m: mL mL mL C sec. M/s 1 2** 3 4 5 6** 7 8 9 10** 11 12 13 14* 15* * Measurements made with a drop of 1.0 mM Ammonium Molybdate ** Repeated measurements for calculating k and Ea A drop of 1% Starch indicator solution is included in each run. S 2 O 3 2- I- BrO 3- H 2 O S 2 O 3 2- I- BrO 3- H + Data, Calculations and Graphs Type a sample calculation for the "Rate" here: (2 pts) Page 3 of 11 Experiment Temp Initial Concentrations (M) Time Rate Run # Celsius sec M/sec Run 1 1 pt Run 2 Run 3 Run 4 1 pt X-axis Y-axis log(Rate) 2 pts 1 pt S 2 O 3 2- I- H + BrO 3- log(I- ) Reaction Order Determination for I- Type your calculation for the concentration of BrO 3- here: HINT BOX Recall that since BrO3- and H+ where held constant, the rate law takes on the following form: Rate = B[I- ] i Therefore, a plot of log(Rate) vs. log(I- ) will yield a straight line with a slope equal to i, the order of the reaction with respect to I- . Place your plot relating to the reaction order for I- here (cover this instruction box so that your graph is an appropriate size). Refer to the box above for hints. Properly label your graph (labels for axes, including units, and a title). Include a trendline and its equation and R 2 value on your graph. This is done by right-clicking on one of the data points on your graph and choosing "Add Trendline" from the drop down menu. The first tab asks what type of trendline you wish to use, and the Options tab allows you to include the trendline equation and R 2 value. Order with respect to I- : (round to nearest whole number) Page 4 of 11 Experiment Temp Initial Concentrations (M) Time Rate Run # Celsius sec M/sec Run 5 2 pts Run 6 Run 7 Run 8 X-axis Y-axis log(Rate) 2 pts 1 pt S 2 O 3 2- I- H + BrO 3- log(BrO 3- ) Reaction Order Determination for BrO 3- Place your plot relating to the reaction order for BrO 3- here (cover this instruction box so that your graph is an appropriate size)....
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Chem162_Kinetics_Report_032410_000 - Page 1 of 11 Name and...

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