Integrated Rate Laws

• First-Order Reactions -- rate = k[R]

• Integrate

  • ln([R]t/[R]0) = -kt

• Example 15.5. Cyclopropane decomposes to propene in a first order reaction with a rate constant of 5.4 e-2 h-1. If the initial concentration is 0.050 M, how many hours must elapse for the concentration to drop to 0.010 M?

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