Chem152_Kinetics2_Report_MAC_6292021

Page 1 of 6 Name: Shreedevi Murugan Quiz Section: 143 AA Lab Partner Jasmine Nguyen Student ID #: 2360468 Chem 152 Experiment #1: Kinetics II, Method of Initial Rates Goals of this lab: • Evaluate initial rate versus concentration measurements to determine the order of a reaction with respect to each reactant and the overall rate constant • Apply the use of a pseudo rate laws to finding the order of reaction with respect to individual reactants in a mixture • Analyze data collected at multiple temperature to calculate the activiation energy • Analyze data collected with and without the use of a catalyst to demonstarate the effect of a catalyst on the activation energy • Use Excel to graphically represent and interpret experimental data • Assemble a complete kinetic description of the reaction from data gathered Your lab report will be graded on the following criteria using a poor/good/excellent rating system: • Calculations are accurate and complete based on data gathered; proper significant figures and units are used • Data evaluated is class data provided by TA; outliers are identified and possible explanations are reasonable • Interpretations of graphs and data are reasonable • Reaction orders and activation energies are determined accurately from data gathered; reasonable conclusions are reached • All graphs and tables and clearly and accurately labeled; entire report is 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 result in 5 points being deducted from your lab score. Signature: ________________________________________ This lab is worth 60 points: 10 points for notebook pages, 50 points for the lab report (Do NOT include your notebook pages when you scan your report for upload into Gradescope.)

Page 2 of 6 NAME: QUIZ SECTION: Table 1. Reagent Stock Concentrations Table 3. Class Data for Temperature and Time with Student-Calculated Rates Solution Conc. Units Run Temperature Temperature D Time Rate S 2 O 3 2- 0.0005 M # °C K sec. M/s I - 0.010 M 1 23.95 297.1 12.8 1.3E-06 BrO 3 - 0.040 M 2 23.68 296.83 24.8 6.7E-07 HCl 0.100 M 3 23.53 296.68 41.5 4.0E-07 4 23.43 296.58 82.5 2.0E-07 5 25.75 298.9 16.5 1.00E-06 Table 2. Initial Concentration for Run #2 6 24.55 297.7 21.5 7.8E-07 7 24.2 297.35 38 4.4E-07 Solution Conc. Units 8 24.4 297.55 66 2.5E-07 S 2 O 3 2- 1.00E-04 M 9 22.68 295.83 7.5 2.2E-06 I - 3.00E-03 M 10 21.95 295.1 18 9.3E-07 BrO 3 - 8.00E-03 M 11 22.43 295.58 34.3 4.9E-07 HCl 2.00E-02 M 12 22.65 295.8 144.8 1.2E-07 13 4.84 277.99 68.3 2.4E-07 14 22.86 296.01 19.6 8.0E-07 15 8.12 281.27 22.4 7.4E-07 Stock Solutions After all reagents are mixed Data, Calculations and Graphs Show your calculation for the "Rate" using data for Run #2 : Rate = (1/6)(change in M of S 2 O 3 2- )/(change in time) Rate = (1/6)(1.0E-4M)/(24.8 seconds) Rate = 6.7E-7 M/s Note: All sections of this report must be typed Show your calculation for the "Working Concentration" of S 2 O 3 2- in Run #2 (see Table 2) : M1V1 = M2V2 (0.0005M)(0.0005L) = 2.5E-7 moles S 2 O 3 2- = (2.5E-7 moles)(0.0025L) S 2 O 3 2- = 1.0E-4 M