The pH of 2.65 M CH₃NH₂(aq) is 12.54. Determine the value of K_b for methylamine.

What is the pH of a 0.300 M solution of aniline (C₆H₅NH₂, K_b = 4.3 × 10⁻¹⁰)?

What is the pH of a 0.420 M solution of C₅H₅NHBr (K_b of C₅H₅NH is 1.7 × 10^-9)?

Morphine is a weak base. a 0.150 m solution of morphine has a pH of 10.5. What is the K_b for morphine?

Determine the pH of a 0.227 M C₅H₅N solution at 25°C. The K_b of C₅H₅N is 1.7 x 10^-9.

Determine the pH of each two-component solution. a. 0.0550 M in HI and 0.00850 M in HF b. 0.112 M in NaCl and 0.0953 M in KF c. 0.132 M in NH₄Cl and 0.150 M HNO₃ d. 0.0887 M in sodium benzoate and 0.225 M in potassium bromide e. 0.0450 M in HCl and 0.0225 M in HNO₃