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NCSU CH 202 - Lab 11 In Lab

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1. 35/35 points Last Response | Show Details All Responses Notes Data Table A. Determination of Rate Law: 2I1- + S2O82- I2 + 2SO42-Run#mL of0.200 MKImL of 0.100M(NH4)2S2O8mL of0.0050MNa2S2O3mL of0.2 MKClmL of 0.100M(NH4)2SO4Elapsed time(sec)1 20.0 20.0 10.0 0.0 0.045 [45]2 10.0 20.0 10.0 10.0 0.0137 [137]3 5.0 20.0 10.0 15.0 0.0312 [312]4 20.0 10.0 10.0 0.0 10.0117 [117]5 20.0 5.0 10.0 0.0 15.0241 [241]Data Table B. Calculations for Determination of Rate LawRun#Initial [I1-] Initial [S2O82-] Initial [S2O32-] Rate k1.0800 [0.0800] M.0400 [0.0400] M1.0e-3[0.0010] M1.1e-5[1.1e-05] M/s3.4e-3[0.0035]2.0400 [0.0400] M.0400 [0.0400] M1.0e-3[0.0010] M3.6e-6[3.6e-06] M/s2.3e-3[0.0023]3.0200 [0.0200] M.0400 [0.0400] M1.0e-3[0.0010] M1.6e-6[1.6e-06] M/s2.0e-3[0.0020]4.0800 [0.0800] M.0200 [0.0200] M1.0e-3[0.0010] M4.3e-6[4.3e-06] M/s2.7e-3[0.0027]5.0800 [0.0800] M.0100 [0.0100] M1.0e-3[0.0010] M2.0e-6[2.1e-06] M/s2.5e-3[0.0026]Question 4a. Select all of the following that are true about the rate of the reaction and [I1-] based on your data from Data Table B.[_] [_] as the [I1-] is decreased by one-quarter, the rate increases by a factor of four [_] [_] as the [I1-] is decreased by one-half or one-quarter, the rate stays the same [_] [_] as the [I1-] is decreased by one-half, the rate decreases by one-quarter [_] [_] as the [I1-] is decreased by one-half, the rate increases by a factor of two[_] [_] as the [I1-] is decreased by one-quarter, the rate decreases by one-twentyseventh [_] [_] as the [I1-] is decreased by one-half, the rate decreases by one-eighth [x] [x] as the [I1-] is decreased by one-half, the rate decreases by one-half [x] [x] as the [I1-] is decreased by one-quarter, the rate decreases by one-quarter [_] [_] as the [I1-] is decreased by one-quarter, the rate decreases by one-sixteenthQuestion 4b. Inspect the data in Data Table B. What is the order of the reaction with respect to iodide ions, I1-?(_) (_) zeroth order (o) (o) first order (_) (_) second order (_) (_) third order (_) (_) other Question 5a. Select all of the following that are true about the rate of the reaction and [S2O82-] based on your data from Data Table B.[_] [_] as the [S2O82-] is decreased by one-quarter, the rate decreases by one-twentyseventh [_] [_] as the [S2O82-] is decreased by one-half, the rate decreases by one-eighth [_] [_] as the [S2O82-] is decreased by one-quarter, the rate increases by a factor of four [_] [_] as the [S2O82-] is decreased by one-half or one-quarter, the rate stays the same [_] [_] as the [S2O82-] is decreased by one-half, the rate increases by a factor of two [_] [_] as the [S2O82-] is decreased by one-half, the rate decreases by one-quarter [x] [x] as the [S2O82-] is decreased by one-quarter, the rate decreases by one-quarter [x] [x] as the [S2O82-] is decreased by one-half, the rate decreases by one-half [_] [_] as the [S2O82-] is decreased by one-quarter, the rate decreases by one-sixteenthQuestion 5b. Inspect the data in Data Table B. What is the order of the reaction with respect to persulfate ions, S2O82-?(_) (_) zeroth order (o) (o) first order (_) (_) second order(_) (_) third order (_) (_) other Question 6. Write out the rate law for the reaction 2I1- + S2O82- I2 + 2SO42-.Remember to use '[ ]' to indicate concentrations and '^' to indicate superscripts. Please put iodide species first and persulfate species second. Select the eye icon to see your formatted response.Rate = k[I^1-][S2O8^2-] [k[I^1-][S2O8^2-] -or- k[I^1-]^1[S2O8^2-]^1]2. 15/15 points Last Response | Show Details All Responses Notes Type your name in the answer box. Your instructor will enter your discretionary lab grade in the score box for this question. mike mcsherry, amit patelKey: Enter a discretionary score for this student, if lower than full


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NCSU CH 202 - Lab 11 In Lab

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