17. Acid and Base Equilibrium

Ka and Kb

Multiple Choice
Identify a Bronsted-Lowry acid with weakest conjugate base.
a) H₃BO₃ K_a = 5.4 × 10⁻¹⁰
b) HF K_a = 3.5 × 10⁻⁴
c) HNO₂ K_a = 4.6 × 10⁻⁴
d) HClO K_a = 2.9 × 10⁻⁸
Multiple Choice
Which of the following $K b$ values represents the strongest base in water?
Multiple Choice
For the following acids in water, which is the weakest acid?
Open Question
What is the 𝐾a reaction of hcn?
Multiple Choice
Determine the pH of 0.450 M HC₇H₅O₂. The K_a for HC₇H₅O₂ is 6.5 × 10⁻⁵.
Open Question
Given that a base has a K_b value of 8.36×10⁻⁴, what is the K_a of its conjugate acid?
Multiple Choice
Which Bronsted-Lowry acid has the weakest conjugate base?
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Multiple Choice
Topic: Ka and Kb. Which of the following is the strongest base in water?
Multiple Choice
Hypochlorous acid ( $H O C l$ ) has $p K_{a} = 7.53$ at $25 ° C$ . What is its acid dissociation constant $K_{a}$ ?
Open Question
What is K_b for the conjugate base of HCN (K_a = 4.9 × 10^-10)?
Multiple Choice
Identify which of the compounds is the strongest species.
a) Iodic acid pK_a = 0.80 b) Acetic acid pK_b = 9.24 c) Formic acid pK_a = 3.75 d) Ammonium pK_b = 4.75
Open Question
Given that K_a for HIO is 3.2×10⁻¹¹ at 25 °C, what is the value of 𝐾_b for IO⁻ at 25 °C?
Multiple Choice
What is the pH of a 0.250 M NH₄Cl solution? K_b for NH₃ = 1.8 × 10⁻⁵.
Open Question
What is K_b for the conjugate base of HCN (K_a = 4.9 × 10⁻¹⁰)?
Multiple Choice
If the Kb of NH₃ is 1.76 x 10^-5, determine the acid dissociation constant of its conjugate acid.
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