a. Provid equations for the individual steps, with the rate orders you would exp

Question

a. Provid equations for the individual steps, with the rate orders you would expect based on the of the in alsteps. Remember to avoid expressi terms of , and D, as necessary). You may combine any rate constants to a Rate for step 1 (forward): ng rates in terms of intermediates (e-g- your answers should be in single (6 pts) Rate for step 1 (reversed): Rate for step 2 (forward) b. If the rate of the reaction is experimentally shown to be R-KIAI. which step is the rate determining step? 14 pts) call it 'icey). The rate 7. Suppose that someone develops a catalyst that causes water molecules to polymerize (et's equations for this process is R-k[H,oj a. If k = 0.0917 L mol min, ho mol/L of water? (6 pts) w many minutes would it take to go from a concentration of 55.3 mol/L of water to 2.0 b. Rate constants (k) are very temperature dependent. Suppose that at 320 K, you run the reaction above (and the R-k[A]2 relationship still holds) and find that a starting concentration of 4.50 mol/L of water produces a starting rate of 0.021 mol/Ls. Find the value of k under these conditions (your answer must have correct units for full credit), (4 pts)

Explanation / Answer

Answer for 7(a)

R = k [H2O]2

This equation shows that the reaction is following second order, and for second order reaction differential form of rate equation is

1/[C] - 1/[Co] = kt

where,

[C] = final concentration of reactant

[C] o= Initial concentration of reactant

k =rate constant

t = time

filling the given information in formula,

1/ [2] - 1/[55.3] = 0.0917 *t

t = 28.35 minutes

Answer for 7(b)

R = k[A]2

k = R / [A]2

= 0.021 /[4.5]2

= 1.03 * 10-3 L/mol.s

  

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