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Arrange the steps of determining a rate law from batch data in order.
1. integrate or differentiate to test the proposal
2. measure concentration against time
3. obtain the rate constant from the fit
4. propose a form for the rate law

  • A.3 - 1 - 4 - 2
  • B.4 - 2 - 1 - 3
  • C.2 - 1 - 4 - 3
  • D.2 - 4 - 1 - 3

Answer: D

A form has to be proposed before it can be tested, and the constant only has meaning once the form is settled. The integral and differential methods are two ways of carrying out the middle step. The proposal has to come before the test.

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