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What concentrations of acetic acid (pKa 4.76) and acetate would be required to prepare a 0.20 M buffer e may differ from that in the first question. STRATEGY 1. Rearrange the Henderson-Hasselbalch equation to solve for the ratio of base (acetate) to acid (acetic acid), [A]/[HA] 2. Use the mole fraction of acetate to calculate the concentration of acetate. 3. Calculate the concentration of acetic acid. That is, there are 1.7 molecules acetate Step 1: The ratio of base to acid is acetic acidacoaic acd r ecolecaile of tep 2: Use the mole fraction of acetate to calculate the concentration of acetate. Number acetate] D
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