Consider the following information for Problems 4-7. Below is a proposed mechanism for the formation of HI from I2 and H2. k₁ 12 (1) 21-(aq) fast kj I- (aq) + H2(g) - H₂I (aq) fast kz k₁ H₂I (aq) + I-(aq) 2 HI (aq) slow 4. Which of the following molecules is an intermediate? Choose the best answer. A. H₂ В.Г C. H₂I D. I and H₂I E. HI 5. You are trying to show that the rate law for this proposed mechanism matches an experimentally determined one. What is the expression for overall or k' for the proposed mechanism? Give your answer in the #5 blank. 6. If this is a valid mechanism, what is the overall reaction order?

What is the half-life for a 2nd order reaction (const. temp. & P): A > B whose initial concentration is 0.500 M, with a k = 6.28 x 10-3 M-' 517 What is the rate constant (in s-') for a 1st order reaction (const. temp. & P): A > B having a starting concentration of 1.50 M, with a half-life of 3.88 minutes? 60 s = 1 min. For the reaction at const. temp.: A > B, having k = 2.26 x 103 M's', how long would it take, IN MINUTES, for [A] to decline to 0.286 M when [A] =1.00 M?

Activated complex 200 (a) 150 Potential Reactants (b) Energy 100 (c) Products 50 Reaction Pathway Nina claims that the graph shown above represents an exothermic reaction with a AH of +100kJ and that energy will be absorbed during this reaction. Is Nina correct? If not, explain and correct her mistake giving explanation. Format BIU- a Farch

. 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.

5. Iodide is oxidized in acid solution by hydrogen peroxide: H2O2(ag) + 2 H*(ag) + 2 I(ag) → L(ag) + 2 H20(1) A proposed mechanism is: Step 1: Slow Н-О2(ад) + I(ag) — Н-О() + OF(ад) Step 2: Fast H*(ag) + OI (ag)→ HOI(ag) Step 3: Fast HOI(ag) + H*(ag) I2(ag) + H2O(1) a) Show that the three elementary steps add up to give the overall, stoichiometric equation. b) What is the molecularity of each step? c) For this mechanism to be consistent with kinetic data, what must be the experimental rate equation?

X app.101edu.co # 3 E UL Week 7: Panopto DII 0 F3 $ R F4 X UL LTU 7-1A Identify the best conditions to complete the SN2 reaction shown below. H % 5 T N3 گیا QL FS A 6 Y Question 18 of 24 40 X F6 & 7 C|Chegg.com U F7 8 A) CH3I, THF B) NaCN, DMSO C) NaN3, ethylamine D) KI, THF X + E) NaN3, DMF PrtScn FB Home ( 9 F9 O ) End 0 & 3 ENG F10 P PgUp - F11 Tp S <10) 1 PgDn D + 6:16 PM 10/18/2022 F12

Rate = -(Delta[RCl])/Delta t andln[RCl]t=-k*t+ln[RCl]0 < [R-Cl]-time equation Test tube A = 0.30 of 0.10M NaOH(aq), 6.70ml DI H2O & 1 drop of bromophenol bue Test Tube B = 3.00M of 0.10M R-CL in acetone. Mix together in 3 water baths Bath A Trial 1= 20C, 53.6s Trial 2= 20C, 49s for color to changeBath B Trial 1= 32C, 18s Trail 2= 32C, 20s Bath C Trial 1= 10C, 204s Trial B= 10C, 200sQ.6 Rearrange the Arrhenius equation into a linear form relating k and TQ.6a To determine Ea, a graph of (xaxis) ____ (in units of ___) vs. (yaxis) ____ needs to be made. This will yioeld a _____ line with a slope = ____ Q.6b enter values used in the table Q.6c Determine the exp. values of Ea with correct sig figs and units

For the gas phase isomerization of cis-cyanostyrene, cis-C6H5CH=CHCN_trans-C%HşCH=CHCN the rate constant at 677 K is 5.01x10-4 51 and the rate constant at 717 K is 3.39x10-35-1. What is the activation energy for this reaction? kJ/mol

7. Which of the following mechanisms is compatible with the rate law obtained in this experiment? Give an explanation for your choice. a) 2 1 (aq) + S₂08²-(aq) → 1₂(aq) + 2 SO4²-(aq) one-step reaction b) I- (aq) + S₂082-(aq) → 1+ (aq) + 2 SO42-(aq) slow step I (aq) + 1+ (aq) → 12 (aq) fast step

●●● 4G III. docs.google.com Looking at the Jablonski diagram below, 13 processes are indicated (1-13), which is the proper order of magnitude of typical rates in sec-1? Absorption 1, 3, 6. Fluorescence 2, 5. Phosphorescence 4. $2 Absorption 1, 2, 6. Fluorescence 3, 5. Phosphorescence 4. Absorption 1, 10, 6. Fluorescence 4, 2. Phosphorescence 3. Absorption 1, 2, 12. Fluorescence 3,6. Phosphorescence5. Electrochemical devices that transform chemical energy into.............. are known as primary cells. mechanical energy. electrostatic energy electric energy heat energy 83 4 + 个 T2 T1 9:-7 个