The pKa of NH4+ is 9.25 at 25°C. The rate constant at 25°C for the reaction...
The pKa of NH4+ is
9.25 at 25°C. The rate constant at 25°C for the reaction of
NH4+ and OH− to form aqueous
NH3 is 4.0 ✕ 1010 dm3
mol−1 s−1. Calculate the rate constant for
proton transfer to NH3.
s−1
What relaxation time would be observed if a temperature jump were
applied to a solution of 0.31 mol dm−3
NH3(aq) at 25°C?
Homework Answers
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The pKa of NH4+ is
9.25 at 25°C. The rate constant at 25°C for the reaction...
The pKa of NH4+ is 9.25 at 25°C. The rate constant at 25°C for the reaction...
The pKa of NH4+ is 9.25 at 25°C. The rate constant at 25°C for the reaction of NH4+ and OH− to form aqueous NH3 is 4.0 ✕ 1010 dm3 mol−1 s−1. Calculate the rate constant for proton transfer to NH3 (Units of s-1).
Please answer the relaxation time question correctly with the correct units asked in the question...
please answer the relaxation time question correctly with the
correct units asked in the question. thank you
The pKa of NH4+ is 9.25 at 25°C. The rate constant at 25°C for the reaction of NH4+ and OH- to form aqueous NH3 is 4.0x1010 dm3 mol-1 s- Calculate the rate constant for proton transfer to NH3. What relaxation time would be observed if a temperature jump were applied to a solution of 0.13 mol dm-3 NH3(aq) at 25°C? 0.027 ns
The...
Rate constants for the forward and reversed steps.
The equilibrium NH3(aq) + H2O(l) NH4(aq) + OH(aq) at 25C is subjected to temperature jump that slightly increases the concentration of NH4(aq) and OH(aq).The measure relaxation time is 7.61 ns. The equilibrium constant for the systems is 1.78x10^-5 at 25C, and the equilibrium concentration of NH3(aq) is 0.15mol/dm^3. Calculate the rate constants for the forward and reverse steps.Hint: Answers are 1.28x10^4 dm^3/mol-sand4.0x10^10 dm^3/mol-s
1) The ionization constant for NH4+ is K = 5.8 x 10-10 at 25oC. It is...
1) The ionization constant for NH4+ is K = 5.8 x 10-10 at 25oC. It is in a reversible equilibrium with ammonia and H+. NH4+ --> NH3 + H+ where, H+ + NH3 --> NH4+ with a k1 = 2.300 x 1010 M-1 s-1 A temperature jump from 20oC to 25oC is made on a 0.1 M NH4Cl solution at pH 6. Calculate the relaxation time in microseconds for the reaction, assuming that the mechanism is given by the ionization...
The second-order rate constant for the reaction below is 0.11 dm3 mol−1 s−1. CH3COOC2H5(aq) + OH−(aq)...
The second-order rate constant for the reaction below is 0.11
dm3 mol−1 s−1.
CH3COOC2H5(aq) +
OH−(aq) →
CH3CO2−(aq) +
CH3CH2OH(aq)
What are the concentrations after the following times when ethyl
acetate is added to sodium hydroxide so that the initial
concentrations are [NaOH] = 0.050 mol dm−3 and
[CH3COOC2H5] = 0.100 mol
dm−3?
(a) 10. s
CH3COOC2 Hs +OHPCH3 COz tCHsCteott iS o.jl Lmai.S shab is 6he concentraron OF ester curter los uhen ebhyl acebaute IS Cadsed 6oSodium hydroxide Ta...
Given the thermodynamic data below, determine the equilibrium constant for the following two reactions at 25...
Given the thermodynamic data below, determine the equilibrium constant for the following two reactions at 25 oC. Predict what will happen to ΔG, how the direction of the reaction will shift, and how the spontaneity will be affected when more BaSO4(s) is added to reaction a), and more NH4+(aq) is added to reaction b). Substance ∆Gof(kJ/mol) Substance ∆Gof(kJ/mol) Substance ∆Gof kJ/mol) BaSO4(s) –1353.1 SO42–(aq) –741.99 NH3(aq) –26.5 Ba2+(aq) –560.66 OH–(aq) –157.30 H2O(l) –237.2 NH4+(aq) –79.5 a. BaSO4(s) ⇌ Ba2+(aq) +...
The equlibrium constant for the equation NH3(aq) + H2O(l) ↔ NH4+(aq) + OH⁻(aq) is Kb= 1.8×10-5...
The equlibrium constant for the equation NH3(aq) + H2O(l) ↔ NH4+(aq) + OH⁻(aq) is Kb= 1.8×10-5 at 25 ºC. Calculate ΔGºrxn at 25 ºC. a) -2.27 kj/mol b) 0 kj/mol c) 2.27 kj/mol d) 267 J/mol 27.1 kj/mol
9.The pka of NH is 9.25. What is the highest pH that a buffer system composed...
9.The pka of NH is 9.25. What is the highest pH that a buffer system composed of NH4 and NH3 will buffer at effectively? a) 13.25 b) 12.25 c) 11.25 d) 10.25 Which of the following mixtures is a buffer: a) 25mL 0.1M HF b) 25mL 0.1M HCI mixed with 25mL 0.1M NaOH. c) 25mL 0.1M NH3 mixed with 12.5mL 0.1M HCI. d) 25mL 0.1M NaF 11. The pH of LiOH was measured to be 11.53. Which of the following...
1. Calculate the concentration of H3O+ for an aqueous solution with a pH of 1.2 A)...
1. Calculate the concentration of H3O+ for an aqueous solution with a pH of 1.2 A) 6.3 x 10-7M B ) 1.6 x 108 M. C) 1.0 x 10-14 M. D) 6.20 x 10-2 M E) 4.0 x 10-4M 2. Calculate the concentration of OH- for an aqueous solution with a pH of 13.8. A) 0.64 M B) 4.0 x 10-5M C) 1.5 x 10-5M D) 1.0 x 10-14 M E) 2.5 x 10-10 M 3. Which of the following...
1.5 1.9 2.0 2.1 22 2.3 24 25 26 2.7 28 3) (a) An enzyme is used to convert a substrate at a temperature of 25°C. The Michaelis constant of this reaction is 0.042 mol dm3. The velocity of the reac...
1.5 1.9 2.0 2.1 22 2.3 24 25 26 2.7 28 3) (a) An enzyme is used to convert a substrate at a temperature of 25°C. The Michaelis constant of this reaction is 0.042 mol dm3. The velocity of the reaction is 2.45 x 104 mol dm s when the substrate concentration is 0.890 mol dm3. Find the maximum velocity of this reaction? hint: vk2Er +161 and vmax (b) Plot v - vs -[S] for a standard enzymatic reaction that...
please answer the relaxation time question correctly with the
correct units asked in the question. thank you
The pKa of NH4+ is 9.25 at 25°C. The rate constant at 25°C for the reaction of NH4+ and OH- to form aqueous NH3 is 4.0x1010 dm3 mol-1 s- Calculate the rate constant for proton transfer to NH3. What relaxation time would be observed if a temperature jump were applied to a solution of 0.13 mol dm-3 NH3(aq) at 25°C? 0.027 ns
The...
The second-order rate constant for the reaction below is 0.11
dm3 mol−1 s−1.
CH3COOC2H5(aq) +
OH−(aq) →
CH3CO2−(aq) +
CH3CH2OH(aq)
What are the concentrations after the following times when ethyl
acetate is added to sodium hydroxide so that the initial
concentrations are [NaOH] = 0.050 mol dm−3 and
[CH3COOC2H5] = 0.100 mol
dm−3?
(a) 10. s
CH3COOC2 Hs +OHPCH3 COz tCHsCteott iS o.jl Lmai.S shab is 6he concentraron OF ester curter los uhen ebhyl acebaute IS Cadsed 6oSodium hydroxide Ta...
9.The pka of NH is 9.25. What is the highest pH that a buffer system composed of NH4 and NH3 will buffer at effectively? a) 13.25 b) 12.25 c) 11.25 d) 10.25 Which of the following mixtures is a buffer: a) 25mL 0.1M HF b) 25mL 0.1M HCI mixed with 25mL 0.1M NaOH. c) 25mL 0.1M NH3 mixed with 12.5mL 0.1M HCI. d) 25mL 0.1M NaF 11. The pH of LiOH was measured to be 11.53. Which of the following...
1. Calculate the concentration of H3O+ for an aqueous solution with a pH of 1.2 A) 6.3 x 10-7M B ) 1.6 x 108 M. C) 1.0 x 10-14 M. D) 6.20 x 10-2 M E) 4.0 x 10-4M 2. Calculate the concentration of OH- for an aqueous solution with a pH of 13.8. A) 0.64 M B) 4.0 x 10-5M C) 1.5 x 10-5M D) 1.0 x 10-14 M E) 2.5 x 10-10 M 3. Which of the following...
1.5 1.9 2.0 2.1 22 2.3 24 25 26 2.7 28 3) (a) An enzyme is used to convert a substrate at a temperature of 25°C. The Michaelis constant of this reaction is 0.042 mol dm3. The velocity of the reaction is 2.45 x 104 mol dm s when the substrate concentration is 0.890 mol dm3. Find the maximum velocity of this reaction? hint: vk2Er +161 and vmax (b) Plot v - vs -[S] for a standard enzymatic reaction that...
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