Consider the following hypothetical data collected in two studies of the reaction 2A(g) + 2B(g) C(g) +
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2A(g) + 2B(g) C(g) + 2D(g)
In experiment 1, [B] = 10.0 M. In experiment 2, [B] = 20.0 M.
a. Use the concentration versus time data to determine the rate law for the reaction.
b. Solve for the rate constant k for the reaction. Include units.
c. Calculate the concentration of A in experiment 1 at t = 30. s.
d. The following three mechanisms are proposed for this reaction:
i. 2B B2 (Fast equilibrium)
B2 + A E + D (Slow)
E + A C + D (Fast)
ii. A + B D + F (Slow)
F + B C + G (Fast)
G + A D (Fast)
iii. A + 2B E + D (Slow)
E + A C + D (Fast)
Choose the best mechanism(s). Include an explanation of which mechanism(s) you exclude and why. If you believe two (or even all three) mechanisms are equally good, explain why.
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