1. Based on the Henderson-Hasselbalch equation (shown below), calculate the pH when half of a solution of acetic acid is dissociated to acetate (the pK a of acetic acid is 4.76).
pH = pK a + log [A – ]/[HA]
• 1.00
• 3.76
• 4.76
• 5.76
2. Based on the Henderson-Hasselbalch equation (shown below), calculate the pH when the ratio of acetic acid to acetate is 10 to 1 (the pK a of acetic acid is 4.76).
pH = pK a + log [A – ]/[HA]
• 1.00
• 3.76
• 4.76
• 5.76
