Ketamine (C₁₃H₁₆ClON) is a weak organic base that is used as a dissociative anesthetic.

C₁₃H₁₆ClON(aq) + H₂O(l) ⇌ C₁₃H₁₆ClONH⁺(aq) + OH⁻(aq)

 For a 0.048 M C₁₃H₁₆ClON solution with a pH of 12.55, what are the C₁₃H₁₆ClONH⁺, OH⁻, and C₁₃H₁₆ClON concentrations at equilibrium?

Hypochlorous acid (HOCl) is produced when chlorine gas (Cl₂) dissolves in water:

Cl₂(g) + H₂O(l) ⇌ HOCl(aq) + HCl(aq)

The solubility of chlorine in water at 30 °C is 0.576 g/100 mL. Calculate the pH and the concentrations of all species (H₃O⁺, OH^–, HOCl, OCl^–, and Cl^–) in a saturated chlorine solution at this temperature. Assume that all chlorine reacts with water. (K_a of HOCl = 2.95×10^–8)

What is the percent ionization of a 0.20 M acetic acid (CH₃COOH, K_a = 1.8×10^–5)? What is the value of the percent ionization when 0.20 M HCl is added to the solution? Explain why the two values are different.

Lactic acid is overproduced by the body of a person with lactic acidosis. A 0.21 M solution of lactic acid has a pH of 2.27. What is the K_a value for the acid?

Pyrrolidine (C₄H₉N), a common building block used in organic synthesis, has a pK_b of 2.69. For a 0.41 M solution of pyrrolidine, determine the pH and the concentration of all species present (C₄H₉N, C₄H₉NH⁺, H₃O⁺, OH^–).

A 3.93×10^–5 M solution of methylamine, a weak organic base, has a pH of 9.56. What are the K_b and pK_b for this base?

Identify the acid with the stronger conjugate base from the following pair: HNO₂ or HNO₃.

Which of the following oxyacids is the strongest?

Determine if the acid shown in the image below is a weak or strong acid.

Consider the following reaction: 

H₃PO₄(aq) + NH₃(aq) → H₂PO₄^-(aq) + NH₄⁺ (aq)

Identify the Brønsted–Lowry acid, the Brønsted–Lowry base, the conjugate acid, and the conjugate base.

Which of the following can be classified as a Bronsted-Lowry base ONLY?

Write the acid-base equation for each weak base. Show its ionization in water to produce OH^-

a. PO₄^3-

b. (CH₃)₂NH

c. CH₃CH₂NH₂