The reaction 2A + B rightarrow C has the following proposed mechanism: 9. If ste

Question

The reaction 2A + B rightarrow C has the following proposed mechanism: 9. If step 2 is the rate-determining step, then the rate law should be: a) k_obs[D][B] b) k_obs[A]^2[B] c) k_obs[A]^2[B]^2 d) k_obs[A][B] e) k_obs[A][B]^2 10. If step 3 were the rate determining step, k_obs would equal: a) k_1k_2k_3 b) k_1k_2k_3(k_1k_2)^-1 c) k_3 d. k_2k_3(k_2)^-1 e) none of these would equal k_obs 11. Which statement(s) below can be made regarding the chemical species E? i) The concentration of E never builds up to a discernable level ii) E is an intermediate iii) The rate of this reaction is greatly effected by the concentration of E a) i b) ii c) i and ii d) ii and iii e) i, ii and iii 12. If step 1 is slow, the rate at which D is formed is: a) first order b) second order c) third order d) fourth order 13. In the two half-reactions shown below, which chromium species is the strongest oxidizing ag Cr_2O_1^2-1 + 14 H^+(aq) + 6 e- rightarrow 2 Cr^3+(aq) + 7 H_2O(l) Edegree = + 1.33 V CrO_4^2+(aq) + 4 H_20(l) + 6 e- rightarrow Cr(OH)_3(s) + 5 OH^-(aq) Edegree = - 0.13 V A) Cr_2O_7^2- B) Cr^3+ C) Cr(OH)_4^2+ D) Cr(OH)_3 E) Cannot be determined

Explanation / Answer

9. If step 2 is rate determining step, the rate law would be,

a) kobs[D][B]

10. If step 3 is rate determining step, kobs becomes,

b) k1k2k3(k-1.k-2)^-1

11. The statement reagding chemical species E,

b) ii

12. If step 1 is slow, the rate of formation of D is,

b) second order

13. In the two half reactions, the strongest oxidizing species of chromium is,

A) Cr2O7^2-

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.