Problem: The decomposition of nitramide, O2NNH2, in water has the following chemical equation and rate law:O2NNH2(aq)→ N2O(g) + H2O(l)rate= [O2NNH2]/[H]A proposed mechanism for this reaction is:k1(1) O2NNH2(aq) ↔ O2NNH(aq) + H(aq)  (fast equilibrium) k-1    k2(2) O2NNH(aq) → N2O(g) + OH(aq)  (slow)    k3(3) H(aq) + OH → H2O(l)  (fast)What is the relationship between the observed value of k and the rate constants for the individual steps of the mechanism?k = __________Which symbols go into the numerator or denominator: k-1, k3, k2, k1.

FREE Expert Solution

The problem is about the decomposition of nitramide (O2NNH2) in water and we’re asked to determine two things:


  • Determine the relationship between the observed value of k and the rate constants for the individual steps of the mechanism.
  • To choose the correct symbols for k.


First, remember that the Elementary steps of the mechanism must result in the overall reaction:

So we add the 3 reaction steps and cancel terms in both reactants and products.


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Problem Details

The decomposition of nitramide, O2NNH2, in water has the following chemical equation and rate law:

O2NNH2(aq) N2O(g) + H2O(l)

rate= [O2NNH2]/[H]

A proposed mechanism for this reaction is:

k1

(1) O2NNH2(aq)  O2NNH(aq) + H(aq)  (fast equilibrium)

 k-1

    k2

(2) O2NNH(aq) → N2O(g) + OH(aq)  (slow)

    k3

(3) H(aq) + OH  H2O(l)  (fast)


What is the relationship between the observed value of k and the rate constants for the individual steps of the mechanism?

k = __________

Which symbols go into the numerator or denominator: k-1, k3, k2, k1.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Rate Law concept. You can view video lessons to learn Rate Law. Or if you need more Rate Law practice, you can also practice Rate Law practice problems.

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Based on our data, we think this problem is relevant for Professor Laskin & Skrynnikov's class at PURDUE.