Calculate the pH of a solution that is 0.080 M  pyridine (pKb = 5.25) and 0.215 M  pyridinium chloride.

What is the pH of a buffer prepared by mixing 20.0 g of acetic acid (HC₂H30₂) and 20.0 g of sodium acetate (NaC₂H30₂) in enough water to form 2.00L of solution. The K, of acetic acid is 1.82 x 10.5.

Calculate the pH of a 1.07 M solution of a weak acid, AH, for instance CH3COOH, and 0.62 M of a salt derived by its conjugate base, ANa, like CH3COONa. The acid dissociation constant, Ka , is 2.27e-6. What is the pH if 38 mL of 0.149 M of a strong acid, like HCl, is added to 100 mL of the buffer solution? What if a strong base, like NaOH, is added with the same ammount instead ?   pH      ← please insert your values   Add acid     = _______   Add base     = _________

5 What volume, in milliliters, of 0.240 M NaOH should be added to a 0.135 L solution of 0.030 M glycine hydrochloride (p Kal = 2.350, pKa2 = 9.778) to adjust the pH to 2.78? 5 NaOH volume = mL