The reaction between peroxodisulphate (VI) ions, S2O8²- and iodide ions, I- can be catalyzed by iron(III) ions, Fe³+. a. suggest a mechanism for the catalytic reaction. b. Sketch an energy profile diagram for the catalyzed and uncatalyzed reactions.
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The reaction between peroxodisulphate (VI) ions, S2O8²- and iodide ions, I- can be catalyzed by iron(III) ions, Fe³+.
a. suggest a mechanism for the catalytic reaction.
b. Sketch an energy profile diagram for the catalyzed and uncatalyzed reactions.
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- The reaction between peroxodisulphate (VI) ions, S2O8^2- and iodide ions, I- can be catalyzed by iron(III) ions, Fe^3+. a). Suggest a mechanism for the catalytic reaction b). Sketch energy profile diagram for the catalyzed and uncatalyzed reaction s..ns.(3) Evaluate the following uses of catalysis in terms of the goals of green chemistry (it is up to you if you want to refer to the 12 Principles or just the more general goals proposed by Dr. Lipke). Identify benefits as well as possible downsides. 2 a. A catalytic process that uses O, to oxidize an organic substrate dissolved in hexanes as a solvent, replacing a previous process that required the use of pyridine-N-oxide as an oxidant. b. A catalytic process that allows organic plant matter to be broken down into small organic molecules that can be used to produce fuels and fine chemicals that would otherwise be made from petroleum. c. A catalytic process that uses a mercury salt to catalyze the oxidation of methane to a methanol derivative, circumventing 2 a more traditional route using H, and CO to produce methanol as an intermediate.The reaction between peroxodisulphate (VI) ions, S2O82-and iodide ions, I- can be catalyzed by iron(III) ions, Fe3+. Suggest a mechanism for the catalytic reaction. Sketch an energy profile diagram for the catalyzed and uncatalyzed reactions.
- What is equilibrium? Write the relationship between Kc and Kp for the reaction involving the gases such that, i. aA + bB ¤ cC + ɖD where A, B, C, and D are all gases, and a, b, c, and d are their respective coefficients, What is hybridization? Explain the hybridization in Phosphorus pentachloride (PCI5) molecule. iii. ii. What is rate law? Write the Integrated rate law expression for 1st order reaction. iv. What is a colligative property? Derive the expression for the elevation in boiling in point when a non-volatile solute is added to a solution. What is pH? Calculate the pH for 0.0001N NH4OH solution of 100mL volume. The pKb value for NH4OH at 25°C is 1.76 x 10-5. v.4. What is the difference between catalysts and intermediates? Catalysts may appear in rate law expressions. Intermediates may appear in rate law expres- sions. A catalyst gets made by an early step in a mech- anism, but used up again in a later step. An intermediate gets made by an early step in a mechanism, but used up again in a later step.What does "shape-selective catalysis" mean to you? Zeolites make effective shape-selective catalysts; why?
- Q2. Carbonic Anhydrase or carbonic dehydratase is a family of metalloenzymes containing zinc (Zn) ion in its active site. Carbonic anhydrase can greatly increase the rate of this reaction, reaching a reaction rate of 104 - 106 per second. It is defined as the enzyme found in red blood cells, other parts of animals and plants, that breaks down carbonic acid with carbon dioxide and water. CO:(2) – H»O(1) – H.CO:(ag) For the carbonic anhydrase activity specified by the equation above, evaluate the standard reaction Gibbs energy at 25 °C?9. Nitrogen dioxide undergoes a synthesis reaction with fluorine. The proposed mechanism is shown below: i. H2 + ICI → HI + HCI (slow) ii. HI + ICI – 1 + HCI (fast) Which step is the rate limiting step? a. b. What is/are the reactive intermediate(s) in this reaction?. c. Using the information in this question, sketch the energy potential diagram for this exothermic reaction. d. How would you expect your energy potential diagram would change if a catalyst were added? Explain. You may find it helpful to show part of your answer on your energy potential diagram from part C. e. If step 2 was the slow step, how would any one of your previous answers change?19. Chemical Reactions A self-catalytic chemical reaction results in the formation of a compound that causes the formation ratio to increase. If the reaction rate V is modeled by V(x) = kx(a – x), 0sIsa where k is a positive constant, a is the initial amount of the compound, and x is the variable amount of the compound, for what value of x is the reaction rate a maximum?
- For the reaction A2 + B2 → 2AB, Ea(fwd) = 125 kJ/mol and Ea(rev) = 85 kJ/mol. Assuming the reaction occurs in one step, (a) draw a reaction energy diagram; (b) calculate ΔH°rxn; and (c) sketch a possible transition state.8. Using the correct catalysts and solvents, what are the likely product outcomes of steps I and III of the following reaction? 1. PBr3 2. Br2 HO 3. H20Use the data given below to find rate constant. Then derive the rate law for this reaction. Show your work in a separate sheet. S20g2-(ag) + 31(ag) 2 SO42-(g) +13 (a4) [S20g2-i (M) [[h (M) Initial Rate (M/s) 0.30 0.42 4.54 0.44 0.42 6.65 0.44 0.21 3.33 Rate = [36 M -1s-1IS 20 8 2-1] [86 M -25-1S 20 82-12 Rate = Rate = [120 M -25-1S 20 82121] Rate = [195 M -3s 1S 20 8 21211-2