Q. A solution is prepared by dissolving 0.23 mol of acetic acid and 0.27 mol of
ID: 964660 • Letter: Q
Question
Q. A solution is prepared by dissolving 0.23 mol of acetic acid and 0.27 mol of sodium acetate in water sufficient to yield 1.00 L of solution.The addition of 0.05 mol of NaOH to this buffer solution causes the pH to increase slightly. The pH does not increase drastically because the NaOH reacts with the ________ present in the buffer solution. The Ka of acetic acid is 1.8 × 10-5.
A solution is prepared by dissolving 0.23 mol of acetic acid and 0.27 mol of sodium acetate in water sufficient to yield 1.00 L of solution.The addition of 0.05 mol of NaOH to this buffer solution causes the pH to increase slightly. The pH does not increase drastically because the NaOH reacts with the ________ present in the buffer solution. The Ka of acetic acid is 1.8 × 10-5.
A.
This is a buffer solution: the pH does not change upon addition of acid or base.
A.
This is a buffer solution: the pH does not change upon addition of acid or base.
acetate acetic acid H3O+ H2OExplanation / Answer
A solution is prepared by dissolving 0.23 mol of acetic acid and 0.27 mol of sodium acetate in water sufficient to yield 1.00 L of solution.The addition of 0.05 mol of NaOH to this buffer solution causes the pH to increase slightly. The pH does not increase drastically because the NaOH reacts with the acetic acid present in the buffer solution. The Ka of acetic acid is 1.8 × 10-5.
This is a buffer solution: the pH does not change upon addition of acid or base.
If NaOH is added it will take a proton from acetic acid giving rise to sodium acetate. Acetate is a weak base and produces acetic acid with rate constant 1.8x 10-5, the pH will not change will be negligible.
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