Department of Chemistry
and Physics
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Department of Chemistry and Physics |
| Worksheets |
Buffers
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1. Calculate the pH of a buffer solution made from equal amounts of 0.30 M hydrofluoric acid and 0.70 M sodium fluoride. Ka = 7.1 x 10-4
2. Calculate the pH of a buffer solution made from 0.30 M hydrofluoric acid and 0.70 M sodium fluoride after the addition of 0.08 mol of NaOH to 1 L of this solution. Assume no change in volume. Ka = 7.1 x 10-4
3. Calculate the pH of a 0.08 M NaOH solution. Compare to the pH found in problem 2.
4. What would be the buffer range for an acid if its Ka = 7.1 x 10-4 ?
5. Calculate the pH of a buffer solution made from 0.30 M hydrofluoric acid and 0.70 M sodium fluoride after the addition of 0.04 mol of HCl to 1 L of this solution. Assume no change in volume. Ka = 7.1 x 10-4
6. Calculate the pH of a 0.04 M HCl solution. Compare to the pH found in problem 5.