Chemistry / Unit 10 Chem 1899 review, 2 to 3 minutes
Capstone: Buffer pH Calculation
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The idea
This capstone builds and then stresses a buffer, combining the Henderson-Hasselbalch equation, the underlying weak-acid equilibrium it is derived from, and buffer capacity into one worked calculation, showing that Henderson-Hasselbalch is a shortcut for an ICE table already at equilibrium, not a separate rule.
Where people slip
Applying Henderson-Hasselbalch past the point where either buffer component is exhausted produces a nonsensical or undefined result rather than a small, correctly attenuated pH shift.
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