201B Work 1 Kinetics

  Chem 201B Dr Lara Baxley Kinetics Worksheet 1   For the reaction below, if substance A is disappearing at a rate of 182 x 10 –2  mol/Ls, at what rate is C appearing? 3 A + 3 B →  5 C + 2 D 2   Ozone (O 3 ) is produced in the stratosphere by the chemical reaction shown below If at a given instant, molecular oxygen (O 2 ) is reacting at a rate of 217 x 10 –5  mol/Ls, at what rate is ozone being produced? 3 O 2  (g) →  2 O 3  (g) 3   For the reaction, H 2 O 2  ( aq ) + 3 I −  ( aq ) + 2 H +  ( aq ) →  2 H 2 O ( l ) + I 3 −  ( aq ) The rate law was experimentally determined to be Rate = k  [H 2 O 2 ][I −  ] a   What is the reaction order in terms of H 2 O 2 ? b   What is the reaction order in terms of I − ? c   What is the reaction order in terms of H + ? d   What is the overall reaction order of this reaction? 4   If a reaction is second order in B and the concentration of B increased from 00850 M to 02975 M, what should happen to the rate?  Chem 201B Dr Lara Baxley 5   The data below were collected for the reaction: BrO 3–  + 5 Br –  + H 3 O +   →   3 Br 2  + 9 H 2 O Exp # Initial Concentration of Reactants (mol/L) Initial Rate (mol/L•s) BrO 3–  Br –  H 3 O +   1 010 010 010 12 2 020 010 010 24 3 010 030 010 36 4 020 010 015 54 a Determine the rate law for this reaction b Calculate the value of k   for this reaction and express it with the correct units 6   The data below were collected for the reaction at 327 °C: H 2  ( g ) + I 2  ( g ) →   2 HI ( g ) Experiment Initial [H 2 ], M Initial [I 2 ], M Initial Rate, mol/L•s 1 0113 0110 301 x 10 –4  2 0220 0330 176 x 10 –  3 0550 0110 147 x 10 –  a Determine the rate law for this reaction b Calculate the value of k for this reaction and express it with the correct units  Chem 201B Dr Lara Baxley 7   The data below was collected for the hypothetical reaction 2 A →  B + C Time (s) [A] t 0 01 40 00768 80 0059 120 00453 160 00348 a In Excel, create both a first-order and a second-order integrated plots b Based on your graphs, is the reaction zero, first or second order? Explain your reasoning c Determine the value for the rate constant with correct units 8   The rate constant for the reaction below is 62 x 10 − 5  mol L − 1 s − 1 If the initial concentration of A is 00500 M, what is its concentration after 115 s? A →  B + C 9   Hydrogen iodide decomposes according to the equation shown below The second order rate constant for this reaction is 16 x 10 –3  L mol –1  s –1  at 700 ºC If the initial concentration of HI in a container is 51 x 10 –2  M, how many minutes will it take for the concentration to be reduced to 49 x 10 –3  M at 700 ºC? 2 HI(g) →  H 2 (g) + I 2 (g)