5. Consider the reaction below. The Kof the weak acid H-X is 1.0 x 10-7. What...
W THE PENCERO .99 37. Consider the reaction of acetic acid in water CH3CO2H(aq)+H2O(l) = CH3CO2 (aq)+H30 (aq) where K=1.8x10-5 Which two bases are competing for the proton? Which is the stronger base? Why do we classify the acetate ion (CH3CO2) as a weak base? Use an appropriate reaction to justify your answer. 38. To summarize, the conjugate base of a weak acid is a weak base and the conjugate acid of a weak base is a weak acid (weak...
If a buffer solution is 0.280 M in a weak base (Kb = 4.0 x 10-5 ) and 0.430 M in its conjugate acid, what is the pH?
If the dissociation constant of a weak acid is 6.4 x 10, at what ratio should you adjust the concentration of the weak acid and its conjugate base in ord a) 0.0500 M weak acid with 0.100 M conjugate base b) 0.100 M weak acid with 0.0100 M conjugate base c)0.500 M weak acid with 0.500 M conjugate base d) 0.0500 M weak acid with 0.500 M conjugate base e) 0 200 M weak acid with 0.100 M conjugate base...
If a buffer solution is 0.100 M in a weak base (Kb = 6.5 x 10-5) and 0.420 M in its conjugate acid, what is the pH? pH =
If a buffer solution is 0.250 M in a weak base (Kb = 6.1 x 10-5) and 0.440 M in its conjugate acid, what is the pH? pH = 10.04
Equilibrium constants for four weak acids are given below. • carolinic acid: 6.2 x 105 • isabellic acid: 4.9 x 107 • jackic acid: 3.1 x 103 • pennic acid: 7.2 x 10-9 Weak acids (referred to as HA below) react with water per the reaction below to form their conjugate base (A™) and hydronium ion (H30"); HA (aq) + H20 (liquid) = A (aq) +H30* (aq) Each acid is reacted with water and allowed to reach equilibrium. When the...
If a buffer solution is 0.270 M in a weak base (Kb = 4.7 x 10-5) and 0.480 M in its conjugate acid, what is the pH? - pH = L pH=
(d) Conjugate acid: OH"; conjugate base: H3* (e) None of these 5. Identify the conjugate acid/base pairs in the following equation (10) HASO4 + H2O <H2AsO4 + OH (A). HASO. (acid)HAsO4 (base): H2O (acid)/ OH (base) (B). HASO4 (acid)/HASO. (base): H2O (acid)/ OH (base) (C). H2AsO4 (acid)/ OH (base) ; H2O (acid)/HASO4 (base) (D). H AsO4 and H20 (acids): OH and HASO4(bases) (E). None of these 6. Which is an INCORRECT statement?(10) a) The conjugate base of H2O is OH....
9) What is the H+ ion concentration in a 4.8 x 10–2 M KOH solution? A) 4.8 x 10–2 M B) 1.0x 10–7 M C) 2.1 x10–13 M D) 4.8 x 10–11 M 10) HA is a weak acid. Which equilibrium corresponds to the equilibrium constant Kb for A-? A) HA (aq) + H2O (l) H2A+ (aq) + OH-(aq) B) A- (aq) + H3O+ (aq) C) HA (aq) + OH- (aq) H2O (l) + H+ (aq) HA (aq) + H2O...
Acid/Base Review Questions: 1. HIO is a weak acid with Ka = 2.00 x 10-11. a. Write the formula for the conjugate base. b. Show the reaction for the acid in water. c. Show the reaction for the conjugate base in water. d. Write the K, expression. e. Write the Kb expression. f. Write the product of Ka x Kb. g. Find the pH of the following solutions: i. 0.100 M HIO 0.115 M NaIO Buffer that is 0.100 M...