17. Acid and Base Equilibrium

pH of Weak Acids

Multiple Choice
What is the pH of a solution that is 0.060 M in potassium propionate and 0.085 M in propionic acid, given that the Ka of propionic acid is 1.3 x 10^-5?
Multiple Choice
At what pH is the side chain of lysine 35% ionized?
Open Question
What is the pH of a 0.400 M solution of HF (K_a = 6.8 × 10^-4)?
Multiple Choice
What is the H₃O⁺ concentration of a 0.250 M hydrofluoric acid (HF) solution, given that the acid dissociation constant (Ka) for HF is 6.8 x 10⁻⁴?
Multiple Choice
If a solution of HF (Ka = 6.8 × 10⁻⁴) has a pH of 2.50, what is the initial concentration of hydrofluoric acid in the solution?
Open Question
What is [H⁺] in a 0.270 M solution of acrylic acid, CH₂CHCOOH (K_a = 3.16 × 10^-5)?
Multiple Choice
What is the pH of a 0.010 M HNO₂ solution, given that the acid dissociation constant (Ka) for HNO₂ is 4.0 x 10⁻⁴?
1
views
Multiple Choice
What is the pH of a 0.050 M solution of HNO2 (Ka = 4.6 × 10^-4)?
Open Question
Calculate [H₃O⁺], [ClO₄^–], and [OH^–] in an aqueous solution that is 0.130 M in HClO₄(aq) at 25°C.
Multiple Choice
What is the pH of a 0.1 M solution of HF, given that the acid dissociation constant (Ka) for hydrofluoric acid is 7.1 x 10^-4?
Multiple Choice
Calculate the pH of a 0.250 M CH3NH3I solution, given that the Kb for CH3NH2 is 4.4 x 10^-4.
Multiple Choice
What is the pH of a 0.200 M CH3NH3Br solution, given that the Kb of CH3NH2 is 4.4 × 10⁻⁴?
Multiple Choice
What is the ratio of HCO₃⁻ to H₂CO₃ in blood with a pH of 7.4?
Multiple Choice
What is the pH of a 0.115 M hydrogen chromate ion (HCrO₄⁻) solution, given that the Ka of HCrO₄⁻ is 3.2 x 10⁻⁷?
Open Question
What is the H⁺(aq) concentration in 0.05 M HCN(aq)? (the K_a for HCN is 5.0 x 10^-10.)