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Chapter 15 Solutions
EBK WEBASSIGN FOR ZUMDAHL'S CHEMICAL PR
- The acid-catalyzed iodination of acetone CH3COCH3(aq) + I2(aq) CH3COCH2I(aq) + HI(aq) is a common laboratory experiment used in general chemistry courses to teach the method of initial rates. The reaction is followed spectrophotometrically by the disappearance of the color of iodine in the solution. The following data (J. P. Birk and D. L Walters, Journal of Chemical Education, Vol. 69, p. 585, 1992) were collected at 23 C for this reaction. Determine the rate law for this reaction.arrow_forwardA reaction is believed to occur by the following mechanism: Stepl: 2AI (Fast equilibrium) Step 2: I + B C (Slow) Overall: 2 A + B C What experimentally determined rate law would lead to this mechanism? (a) Rate = k[A][B] (b) Rate = k[A]2[B] (c) Rate = k[A]2 (d) Rate = k[I][B]arrow_forwardThe rate constant, k, at 25 C is 0.27/h for the reaction Pt(NH3)2Cl2(aq) + H2O() [Pt(NH3)2(H2O)Cl]+(aq) + Cl(aq) and the rate equation is Reaction rate = k[Pt(NH3)2C12] Calculate the rate of reaction when the concentration of Pt(NH3)2Cl2 is 0.020 M.arrow_forward
- The Raschig reaction produces the industrially important reducing agent hydrazine, N2H4, from ammonia, NH3, and hypochlorite ion, OCl−, in basic aqueous solution. A proposed mechanism is Step 1: Step 2: Step 3: What is the overall stoichiometric equation? Which step is rate-limiting? What reaction intermediates are involved? What rate law is predicted by this mechanism?arrow_forwardно HO HO HO 0 + ½ O, → + H,0 H H но он ascorbic acid dehydroascorbic acid Vitamin C is oxidized slowly to dehydroascorbic acid by the oxygen in air. It is catalyzed by ions such as Cu*2 and Fe*3. The reaction can be followed by measuring the ultraviolet absorbance at 243 nm. Time (hours) Absorbance (A) 1/A In A - In A 0.75 1.3 -0.29 0.29 1 0,38 2.6 -0.97 0.97 2 0.19 5.3 - 1.7 1.7 3 0.095 11 - 2.4 2.4 28. A new compound is synthesized and found to be a monoprotic acid with a molar mass of 248 g/mole. When 0.0050 moles of this acid are dissolved in 0.500L of water, the pH is measured as 2.94. What is the pKa of this acid? (A) (B) (C) (D) 2.33 3.89 5.78 7.78 29. What is the hybridization of carbon 1 (far left) and carbon 2 (middle) in this hydrocarbon: CH3CH=CH2? (A) sp³, sp (B) sp?, sp? (C) sp³, sp? (D) sp, sp?arrow_forwardно HO HO HO 0 + ½ O, → + H,0 H H но OH ascorbic acid dehydroascorbic acid Vitamin C is oxidized slowly to dehydroascorbic acid by the oxygen in air. It is catalyzed by ions such as Cu*2 and Fe*3. The reaction can be followed by measuring the ultraviolet absorbance at 243 nm. Time (hours) Absorbance (A) 1/A In A - In A 0.75 1.3 -0.29 0.29 1 0.38 2.6 -0.97 0.97 2 0.19 5.3 - 1.7 1.7 3 0.095 11 - 2.4 2.4 29. What is the hybridization of carbon 1 (far left) and carbon 2 (middle) in this hydrocarbon: CH3CH=CH2? (A) sp³, sp (B) sp?, sp? (C) sp³, sp? (D) sp, sp?arrow_forward
- The formation of dinitrogen pentoxide is described by the following chemical equation: 2NO, (g) + O; (g) → 0, (g) + N,O5 (g) Suppose a two-step mechanism is proposed for this reaction, beginning with this elementary reaction: NO2 (g) + 03 (g) NO; (g) + 0, Suppose also that the second step of the mechanism should be bimolecular. Suggest a reasonable second step. That is, write the balanced chemical equation of a bimolecular elementary reaction that would complete the proposed mechanism.arrow_forwardThe enzyme carbonic anhydrase catalyzes the following reaction: CO2 (g) + H2O(1) - HCO3 (aq) +H+(aq) -1 In water, without the enzyme, the reaction proceeds with a rate constant of 0.039 s at 24 °C. In the presence of the enzyme in water, the reaction proceeds with a rate constant of 1.0 ×106 s-1 at 24 °C. Part A Assuming the collision factor is the same for both situations, calculate the difference in activation energies for the uncatalyzed (Ea) versus the enzyme-catalyzed (Eac) reaction. Express your answer in kilojoules to two significant figures. Ea – Eac = kJ Submit Request Answerarrow_forwardUnder certain conditions, the reaction 3 A+ 4B 5C is observed to proceed at a rate of 0.0275 M s ¹. What is the corresponding rate of change in product C?arrow_forward
- The mechanism for the reaction described by the equation CH,NC(g) CH, CN(g) is suggested to be k1 (1) A(g) + M(g) = A" (g) + M(g) k-1 k2 * (2) А (g) → B(g) where A(g) is CH, NC(g), M(g) is any gas molecule, A* (g) is CH,NC*(g) (an energized gas molecule), and B(g) is CH,CN(g). Assuming that [A* ] is governed by steady-state conditions, derive the rate law for the production of CH, CN(g) in terms of [A], [M], and the appropriate k values.arrow_forwardThe rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy 1 −1 E = 16.0 kJ/mol. If the rate constant of this reaction is 9.1 x 107 M¹s at 136.0 °C, what will the rate constant be at 73.0 °C? Round your answer to 2 significant digits. 1 k = | M²¹ · S 1 ☐ x10 ? olo Ararrow_forwardCan I get the solution of the problem?arrow_forward
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