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Determination of Buffer Capacity

Outline. PurposeBuffersEquilibrium Expression / Henderson-Hasselbalch EquationThings to RememberBuffer CapacitySafety ConcernsSolutions and WasteWhat to turn inExperiment 6 Reminder. Purpose . Students will determine the buffer capacity of several acetic acid / acetate buffer solutions using

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Determination of Buffer Capacity

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    1. Determination of Buffer Capacity Experiment 5

    2. Outline Purpose Buffers Equilibrium Expression / Henderson-Hasselbalch Equation Things to Remember Buffer Capacity Safety Concerns Solutions and Waste What to turn in Experiment 6 Reminder

    3. Purpose Students will determine the buffer capacity of several acetic acid / acetate buffer solutions using a pH probe.

    4. Buffers A buffered solution is a solution that resists a change in pH. In order to have a buffer, two components are essential: a weak acid a weak base These two must have a common ion: called a conjugate acid-base pair

    5. Buffer Example Acetic Acid / Acetate Ion: CH3COOH CH3COO- + H+ Weak acid neutralizes OH-: OH- + CH3COOH CH3COO- + H2O Weak base neutralizes H+: H+ + CH3COO- CH3COOH Thus, a change in pH is resisted.

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