10. The hydration of CO2 from the atmosphere according to the reaction CO2(g) + H2O(l) HCO3–(aq) + H+(aq)
can be catalyzed by the enzyme carbonic anhydrase. Consider how a catalyst works. Will the catalyst affect the rate of both the forward and reverse reactions? Explain your reasoning.
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10. The hydration of CO2 from the atmosphere according to the reaction CO2(g) + H2O(l) HCO3–(aq)...
The enzyme carbonic anhydrase catalyzes the reaction CO2(g)+H2O(l)−→−HCO3−(aq)+H+(aq).CO2(g)+H2O(l)→ HCO3−(aq)+H+(aq). In water, without the enzyme, the reaction proceeds with a rate constant of 0.039s−10.039 s−1 at 25°C.25 °C. In the presence of the enzyme in water, the reaction proceeds with a rate constant of 1.0×106s−11.0×106 s−1 at 25°C.25 °C. Assuming the collision factor is the same for both situations, calculate the difference in activation energies for the uncatalyzed versus enzyme- catalyzed reaction.
Reversible reaction to consider: CO2(g) + H2O(l) + Na+(aq)+Cl-(aq)= HCO3(aq) +H+(aq)+Cl-(aq) Note: This reaction models atmospheric CO2 which dissolves in the ocean in a reversible reaction. Answer the following questions: 1. From an equilibrium perspective, what happens to the pH of the ocean when the concentration of CO2 in the atmosphere increases? 2. What affect on equilibrium would occur if some Na is removed from the reaction? 3. If the pH of the ocean was lowered by adding a large quantity...
(15 points) Consider the following reaction: CO2+H20 F HCO; +H* This reaction is catalyzed by the enzyme carbonic anhydrase. The following data was obtained for an initial enzyme concentration of 2.3 nM and temperature of 0.5°C: [CO2] (MM) 1.25 Rate (M/s) 2.8x10-5 5.00x 10-5 8.33x10-5 1.67x10-4 2.5 5.0 20.0 Determine Km and Vmax for this reaction at the given enzyme concentration and temperature.
Consider the following equilibrium reaction: CaCO3 (s) + CO2 (g) + H2O (l) ⇌ 2 HCO3- (aq) + Ca2+ (aq) Which of these species should be included in the equilibrium constant expression (K) for this reaction? Select all that apply A.) Ca2+ (aq) B.) CaCO3 (s) C.) H2O (l) D.) CO2 (g) E.) HCO3- (aq)
10.39 The first-order rate constant for the dehydration of carbonic acid, H2CO3(aq) = CO2(g) + H2O(1) is about 1 x 102 s-. In view of this rather high rate constant, explain why it is necessary to have the enzyme carbonic anhydrase to enhance the rate of dehydration in the lungs.
Which of the following is a Brønsted-Lowry acid-base reaction? CH3CH2NH2(aq)+C6H5COOH(aq)⇄CH3CH2NH3+(aq)+C6H5COO-(aq) H2O(l)+CO2(aq)⇄HCO3-(aq)+H+(aq) Fe3+(aq)+H2O(l)⇄FeOH2+(aq)+H+(aq) HCl(aq)+Zn(s)⇄ZnCl2(aq)+H2(g)
a) The consecutive equilibria: CO2(g) <=>CO2(aq) + H2O(l) <=>H2CO3(aq) <=>H+(aq) + HCO3-(aq), explain why: A. carbonated beverages are less acidic than pure water. B. carbonated beverages contain measurably less water than the same volume of pure water. C. rainwater is slightly acidic b) A 1.0 M solution of a weak monoprotic acid with Ka = 1.0 10-6 would have a pH of: A. 1 B. 2 C. 3 D. 6 c) Ascorbic acid is a diprotic acid with Ka1 =...
Atmospheric CO2 (g) is in equilibrium with dissolved CO, (aq), CO2(g) CO2 (aq) CO: (aq) then can react with water to become H_CO. CO2 (aq) + H:0 (1) ~ HCO, (aq) (2) Add the two reactions together and determine the overall net reaction. If the K, for reaction (1) is 1.44 x 10-4 and for reaction (2) the K is 1.90 x 10-2, then what would the K, for the overall net reaction be? Explain. Increasing CO, (g) would have...
6 The decomposition of ozone in the upper atmosphere is catalyzed by NO. The overall reaction and rate law are: rate k[O][NO] Os(g)+O(g)+20;(g); Write a possible mechanism that is consistent with rate law and identify an intermediate in the reaction. 7. A possible mechanism for the iodide ion catalyzed decomposition of hydrogen peroxide in aqueous solution is: -slow H2O:(aq) +I(aq)H;O(1) + 0I°(aq) -fast H20:(aq) +Or(aq)H:O()) +02(g)+l'(aq) What is: iv) the catalyst? iv) the intermediate ii) the rate law i) the...
Consider the half reactions below and determine the overall reaction. H2C20_(aq) – 2 CO2(g) + 2 H+ (aq) + 2 e NO3 (aq) + 4 H*(aq) + 3 e — NO(g) + 2 H20 How many electrons are transferred in the oxidation half-reaction? Choose... How many electrons are transferred in the reduction half-reaction? Choose... How many electrons are transferred in the overall reaction? Choose... -