A proposed mechanism for the gas-phase chlorination of methane is
Suppose the first step is the RDS. What is the expected rate law in terms of the original reactants,
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Physical Chemistry
- The photochemical chlorination of trichloromethane (chloroform, CHCl3) in the gas to give CCl4 has been found to follow the rate law d[CCl4]/dt = kr[Cl2]1/2Ia1/2. Devise a mechanism that leads to this rate law when the chlorine pressure is high.arrow_forward. The proposed reaction mechanism is as follows:i. BrO3- (aq) + H+ (aq) à HBrO3 (aq) [Fast]ii. HBrO3 (aq) + H+ (aq) à H2BrO3+ (aq) [Medium]iii. H2BrO3+ (aq) + Br- (aq) à Br2O2 (aq) + H2O (ℓ) [Slow]iv. Br2O2 (aq) + 4H+(aq) + 4Br-(aq) à 3Br2 (ℓ) + H2O (ℓ) [Fast]Evaluate the validity of this proposed reaction. Justify your answer.arrow_forwardThe proposed reaction mechanism is as follows:i. BrO3- (aq) + H+ (aq) = HBrO3 (aq) [Fast]ii. HBrO3 (aq) + H+ (aq) = H2BrO3+ (aq) [Medium]iii. H2BrO3+ (aq) + Br- (aq) = Br2O2 (aq) + H2O (ℓ) [Slow]iv. Br2O2 (aq) + 4H+(aq) + 4Br-(aq) = 3Br2 (ℓ) + H2O (ℓ) [Fast]Evaluate the validity of this proposed reaction. Justify your answer.arrow_forward
- The following mechanism has been proposed for the conversion of tert-butyl bromide to tert-butyl alcohol in aqueous solution: step 1 : (CH3)3CBr (CH3)3C+ + Br- step 2 : (CH3)3C+ + OH- (CH3)3COH(a) Identify the molecularity of each step in the mechanism.step 1 _________ (unimolecularbimoleculartermolecular) step 2 _________ (unimolecularbimoleculartermolecular) (b) Write the equation for the net reaction. Use the smallest integer coefficients possible. If a box is not needed, leave it blank._______+________>________+_________(c) Identify any intemediates in this mechanism. Intermediate: Enter formula. ________ If none, leave box blank: fill in the blanksarrow_forwardChoose the correct molecularity and rate law for each of the elementary reactions shown below. (a) I(g) + Br(g) Æ IBr(g) Molecularity: unimolecular bimolecular termolecular Rate Law: Rate = k [I] [Br] Rate = k [I]2 [Br]2 Rate = k [IBr]2Rate = k [IBr] (b) IBr(g) Æ I(g) + Br(g) Molecularity: unimolecular bimolecular termolecular Rate Law: Rate = k [IBr]2 Rate = k [I]2 [Br]2 Rate = k [I] [Br]Rate = k [IBr] (c) NO(g) + N2O(g) Æ N2(g) + NO2(g) Molecularity: unimolecular bimolecular trimolecular Rate Law: Rate = k [N2] [NO2] Rate = k [N2]2 [NO2]2 Rate = k [NO] [N2O] Rate = k [NO]2 [N2O]2 (d) 2 I(g) Æ I2(g) Molecularity: Rate Law: Rate = k [I2]2Rate = k [I]2 Rate = k [I2]Rate = k [I] (e) I2(g) Æ 2 I(g) Molecularity: Rate Law:…arrow_forwardWhat is the mechanism to get from the reactants to the productarrow_forward
- What is the value of the rate law constant for the reaction shown in the picture? a) -1.9 x10^4 b) +1.9 x 10^4 c) -5.2 x 10^-5 d) +5.2 x 10^-5 e) +6.2arrow_forwardA study of the rate of dimerization of C4H6 gave the data shown in the table: 2C4H6→C8H12 Time (s) [C4H6] (M) 0 1.00 x 10–2 1600 5.04 x 10–3 3200 3.37 x 10–3 4800 2.53 x 10–3 6200 2.08 x 10–3 What is the instantaneous rate of dimerization at 3200 s? Create a graph of time versus [C4H6] to help answer this question. Question 1 options: a) 9.4 x 10-7 M s-1 b) 8.2 x 10-7 M s-1 c) 7.7 x 10-7 M s-1 d) 6.5 x 10-7 M s-1arrow_forwardConsider the following reaction mechanism. Step 1 : W2 ⇌ 2W (fast) Step 2 : W + Z ⇌ D + F (fast) Step 3 : W + F → M (slow)What are the intermediates?arrow_forward
- step1) 2a--->b+c step 2) b+a---->d what is the overall reaction resulting from the mechanism.arrow_forwardThe following three-step mechanism has been proposed for the reaction of chlorine (Cl2) with chloroform (CHCl3): Cl2 (g) <-> 2 Cl (g) (fast) Cl (g) + CHCl3 (g) --> HCl (g) + CCl3 (g) (slow) CCl3 (g) + Cl (g) --> CCl4 (g) (fast) The numerical values of the rate constants for the steps are: k1 = 4800, k-1 = 3600, k2 = 0.013, and k3 = 0.027. What rate law is predicted by this mechanism? What is the value of kobs for this mechanism?arrow_forwardIf the rate constant in a first-order degradation reaction of a drug product is 0.462/year, what is the shelf-life of the drug product in months?arrow_forward
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning