Day 36 Podia Question

Podia Question

The important industrial chemical hydrazine, N2H4, is produced by the Raschig process. Here is a proposed mechanism for the process:

Step 1 (slow): NH3(aq) + OCl(aq) ⟶ NH2Cl(aq) + OH(aq)

Step 2 (fast): NH2Cl(aq) + NH3(aq) ⟶ N2H5+(aq) + Cl(aq)

Step 3 (fast): N2H5+(aq) + OH(aq) ⟶ N2H4(aq) + H2O(l)

  1. Determine which is the rate-limiting step. Describe how this step limits the overall reaction rate.
  2. Determine the overall reaction equation for the Raschig process.
  3. Identify all reaction intermediates in the proposed mechanism.
  4. Another student tells you that the reaction is second-order in ammonia and does not depend on any other concentration. The student says this is consistent with the mechanism written above. Explain why the student is, or is not, correct.

Two days before the next whole-class session, this Podia question will become live on Podia, where you can submit your answer.

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Chemistry 109 Fall 2021 by John Moore, Jia Zhou, and Etienne Garand is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.