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What concentrations of acetic acid (pKa 4.76) and acetate would be required to prepare a 0.10 M buffer solution at pH 4.9? Note that the concentration and/or pH value 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), DA I/OHAl 2. Use the mole fraction of acetate to calculate the concentration of acetate 3. Calculate the concentration of acetic acid That is, there are 1.4 molecules Step 1: The ratio of base to acid is 1.4 of acetate for each molecule of acetic acid. Step 2: The mole fraction of acetate is 0.58, and the concentration of acetate is 0.058. Step 3: Calculate the concentration of acetic acid Number M acetic acid

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