This question pertains to the pH of a weak acid/weak base salt combo. For an aq...
This question pertains to the pH of a weak acid/weak base salt combo. For an aq solution of NH4NO2, these are the combinations of reactions that are possible.
(1) NH4+(aq) + NO21-(aq) ⇆ NH3(aq) + HNO2(aq)____________K1 = ?
(2) NH4+(aq) + H2O(l) ⇆ H3O+(aq) + NH3(aq)_______________Ka = 5.6 x 10-10
(3) NO21- + H2O(l) ⇆ HNO2(aq) + OH-(aq)_________________Kb = 2.2 x 10-11
(4) 2H2O(l) ⇆ H3O+(aq) + OH-(aq)_________________________Kw =1.0 x 10-14
Write the symbolic expression for the equilibrium constants (I already did this don't worry about it).
Derive an expression for K1 in terms of Ka, Kb, and Kw; find the numerical value of K1. I'm really at a loss as to what to do. Thanks!
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This question pertains to the pH of a weak acid/weak base salt
combo. For an aq...
For aq. solutions of salt NH4NO2, following reactions possible: NH4+ + NO2- -> NH3 + HNO2...
For aq. solutions of salt NH4NO2, following reactions possible: NH4+ + NO2- -> NH3 + HNO2 k1? NH4+ + H2O -> H3O+ + NH3. ka = 5.6 x 10^-10 NO2- + H2O -> HNO2 + OH- kb =2.2 x 10^-11 2H2O -> H3O+ + OH- kw = 1.0 x10^-14 Write symbolic expression for equilibrium constants for each reaction. Derive expression for k1 in terms of ka, kb, and kw; find numerical value of k1.
PART A is already solved. It is provided for context for you :) PART A: If...
PART A is already solved. It is provided for context for you :) PART A: If you have a initial conc. 0.10M NH4NO2, make an ICE table, solve for concentration of NH4+, NO2-, NH3 and HNO2.K1 value is 1.23e-6 NH4+NO2<=>NH3+HNO2 [NH4] and [NO2] both are 9.99e-2 M [NH3] and [HNO2] were found to be 1.11e^-4 M PART B (the part I need help with): Using the values you found in part A (conc. of NH4 and NH3), find the value...
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...
10. For an aqueous solution labeled "0.10 M potassium bromide," A) the pH is greater than...
10. For an aqueous solution labeled "0.10 M potassium bromide," A) the pH is greater than 7. B) the pH = 13. D) the pH is less than 7. E) the pH = 7. C) the pH = 1. 11. For a 0.10 M solution of a weak acid, HA, with pKa = 6, which of the following is true? A) [HA] =[A-] B) [HA] does not equal [H3O+] C) [HA] =[H3O] D) [HA] = K E) [HA] = 0...
This problem deals with Acid-base titrations and pH scale for a weak acid and a weak...
This problem deals with Acid-base titrations and pH scale for a weak acid and a weak base. Calculate the pH of the solution that results from adding 7.5 [ml] of Ammonia (NH3) to a beaker that contains, 100 ml of distilled water and 15 ml of 0.1 M Acetic acid (HC2H3O2). A buret containing 50 mL of 0.1 M Ammonia (NH3) is being used as the titrant. The beaker containing 100 ml of distilled water, and 15 ml of 0.1...
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Calculate the value of Kc for the generic acid-base reaction: B (aq) + HA(aq) BH(aq) + A-(aq) Kc = ? Given the following information B(aq) + H20 (1) BH(aq) + OH"(aq) Kb = 2.80 x 10-7 HA(aq) + H2O(1) = A*(aq) + H30+(aq) Kg = 1.00 x 10-5 2H2O(1) = H30+ (aq) + OH- (aq) Kw = 1.00 x 10-14 Calculate Kc for the following reaction: Ex-(aq) + HA(aq) = BH(aq) + F"(aq) Kc = ? Record your answer in...
(Set 2) Practice Problems in Equilibrium All weak acids use this generic equation: HA(aq)+ H2O() A (aq) + H30*(aq) And...
(Set 2) Practice Problems in Equilibrium All weak acids use this generic equation: HA(aq)+ H2O() A (aq) + H30*(aq) And all weak bases use this one: B(aq)+ H2O(I) = BH*(aq)+ OH'(aq) Part A: Finding K, or Kb 3.012? What is the value of Ka for a weak acid if a 1.44 M solution has a pH 1. 2. A weak acid is 0.00987 M, but is found to be 25.5 % ionized. What is the pH? 3. The pH for...
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What is the pH of a 0.44 M solution of a weak acid HA, with a Ka of 3.19×10−12? The equilibrium expression is: HA(aq)+H2O(l)⇌H3O+(aq)+A−(aq)
Question 7 Caffeine, CH 10N4O2 (aq) is a weak base. What is the value of K...
Question 7 Caffeine, CH 10N4O2 (aq) is a weak base. What is the value of K for caffeine if a solution at equilibrium has [C3H10N 02] = 0.050 M [C8H10N4O2H*]= 5.0 x 10-3M and [OH-] = 2.5 x 10-3M? Write the ionization of caffeine with water and write the Kb expression. Then solve for the kb.
Ammonia react with water as shown in the following equation: NH3(aq) + H2O(l) NH4+(aq) +...
Ammonia react with water as shown in the following equation: NH3(aq) + H2O(l) NH4+(aq) + OH-(aq) Kb = 1.77 x 10-5 and Ka = 5.65 x 10-10 a) Calculate the pH of the 0.030 M NH3 solution (Use a labeled ICE table) b) Calculate the pH of the solution at the equivalent point (when equal amount of acid is added. Assume the volume doubles). (Use a labeled ICE table) c) Over which pH range (actual numbers) do you expect...
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...
10. For an aqueous solution labeled "0.10 M potassium bromide," A) the pH is greater than 7. B) the pH = 13. D) the pH is less than 7. E) the pH = 7. C) the pH = 1. 11. For a 0.10 M solution of a weak acid, HA, with pKa = 6, which of the following is true? A) [HA] =[A-] B) [HA] does not equal [H3O+] C) [HA] =[H3O] D) [HA] = K E) [HA] = 0...
Calculate the value of Kc for the generic acid-base reaction: B (aq) + HA(aq) BH(aq) + A-(aq) Kc = ? Given the following information B(aq) + H20 (1) BH(aq) + OH"(aq) Kb = 2.80 x 10-7 HA(aq) + H2O(1) = A*(aq) + H30+(aq) Kg = 1.00 x 10-5 2H2O(1) = H30+ (aq) + OH- (aq) Kw = 1.00 x 10-14 Calculate Kc for the following reaction: Ex-(aq) + HA(aq) = BH(aq) + F"(aq) Kc = ? Record your answer in...
(Set 2) Practice Problems in Equilibrium All weak acids use this generic equation: HA(aq)+ H2O() A (aq) + H30*(aq) And all weak bases use this one: B(aq)+ H2O(I) = BH*(aq)+ OH'(aq) Part A: Finding K, or Kb 3.012? What is the value of Ka for a weak acid if a 1.44 M solution has a pH 1. 2. A weak acid is 0.00987 M, but is found to be 25.5 % ionized. What is the pH? 3. The pH for...
Question 7 Caffeine, CH 10N4O2 (aq) is a weak base. What is the value of K for caffeine if a solution at equilibrium has [C3H10N 02] = 0.050 M [C8H10N4O2H*]= 5.0 x 10-3M and [OH-] = 2.5 x 10-3M? Write the ionization of caffeine with water and write the Kb expression. Then solve for the kb.
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