Question

Calculate the [H⁺] of the following mixtures. (2.5 marks per part)

a.        Dilution and Common Ion problem: 25 mL of 0.10 M HClO₄ and 25 mL of 0.15 M HClO (K_a = 2.9 x 10^-8)

b.       Buffer problem: 25 mL of 0.025 M lactic acid (for which K_a = 1.37 × 10^–4) and 25 mL of 0.015 M NaOH

c.       Dilution and Weak Acid problem: 25 mL of 0.10 M ascorbic acid and 25 mL of water

d.       Dilution and Conjugate Acid problem: 25.0 mL of 2.50 × 10^-3 M nicotine (for which K_b = 1.05 × 10^-6) and 50.0 mL of 1.25 × 10^-3 M HCl

Answer 1