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...
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.
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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...
10. The hydration of CO2 from the atmosphere according to the reaction CO2(g) + H2O(l) HCO3–(aq)...
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.
10. The hydration of CO2 from the atmosphere according to the reaction CO2(e) + H20(1) HCO3(aq) + H+(aq) can be catalyzed by the enzyme carbonic anhydrase. Consider how a catalyst works. Will the...
The enzyme carbonic anhydrase catalyzes the hydration of CO2 gas in red blood cells: &
The enzyme carbonic anhydrase catalyzes the hydration of CO2 gas in red blood cells: CO2 (g) + H2O (L) →H2CO3 (aq) Determine the ∆Ssys of this reaction at 37 °C (body temperature), and justify the sign. *Thermodynamic parameters at T=298K and 1 bar Sm (JK-1 mol-1) Cp (JK-1 MOL-1) CO2 (g) 213.7 36.8 H2O (L) 69.9 78.2 H2CO3 (aq) 187.4 19.4
Consider the following equilibrium reaction: CaCO3 (s) + CO2 (g) + H2O (l) ⇌ 2 HCO3- (aq)...
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 1...
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.
Reversible reaction to consider: CO2(g) + H2O(l) + Na+(aq)+Cl-(aq)= HCO3(aq) +H+(aq)+Cl-(aq) Note: This reaction models atmospheric CO2...
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...
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)
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...
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 =...
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 beve...
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 =...
(15 points) Consider the following reaction: CO2+H20 F HCO; +H* This reaction is catalyzed by the...
(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.
Which of the following are redox reactions? CO2(g) + 2H2O(l) H3O+(aq) + HCO3-(aq) 2CuS(s) + O2(g)...
Which of the following are redox reactions?
CO2(g) + 2H2O(l)
H3O+(aq) +
HCO3-(aq)
2CuS(s) + O2(g)
Cu(s) + SO2(g)
2AgNO3(aq) + Cu(s)
Cu(NO3)2(aq) + 2Ag(s)
2AgNO3(aq) +
Na2SO4(aq)
2NaNO3(aq) +
Ag2SO4(s)
CO(g) + H2O(g)
CO2(g) + H2(g)
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.
10. The hydration of CO2 from the atmosphere according to the reaction CO2(e) + H20(1) HCO3(aq) + H+(aq) can be catalyzed by the enzyme carbonic anhydrase. Consider how a catalyst works. Will the...
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.
(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.
Which of the following are redox reactions?
CO2(g) + 2H2O(l)
H3O+(aq) +
HCO3-(aq)
2CuS(s) + O2(g)
Cu(s) + SO2(g)
2AgNO3(aq) + Cu(s)
Cu(NO3)2(aq) + 2Ag(s)
2AgNO3(aq) +
Na2SO4(aq)
2NaNO3(aq) +
Ag2SO4(s)
CO(g) + H2O(g)
CO2(g) + H2(g)
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