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11 Nov 2019
What concentrations of acetic acid (pKa4.76) and acetate would be required to prepare a 0.20 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), [ATVHA 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 Step 2: The mole fraction of acetate is 0.58, and the concentration of acetate is 0.12. Step 3: Calculate the concentration of acetic acid. acetic acid. Number acetic acid- 0.116
What concentrations of acetic acid (pKa4.76) and acetate would be required to prepare a 0.20 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), [ATVHA 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 Step 2: The mole fraction of acetate is 0.58, and the concentration of acetate is 0.12. Step 3: Calculate the concentration of acetic acid. acetic acid. Number acetic acid- 0.116
Jean KeelingLv2
18 Aug 2019