The maximum buffering capacity of a solution is when the pH of the solution is equal to pKa and the buffer range of a solution is pH = pKa ± 1.
• maximum buffering capacity: pH = pKa
• buffering range: pH = pKa ± 1
Recall the Henderson-Hasselbalch equation:
A 1.0 L buffer solution is 0.12 M in HNO2 and 0.060 M in KNO2. Which action destroys the buffer?
a. adding 0.060 mol of KNO2
b. adding 0.060 mol of KOH
c. adding 0.060 mol of HNO3
d. none of the above
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