Acid-Base Buffers and Titrations Problem Set
This problem set was developed by S.E. Van Bramer for Chemistry 146 at Widener University.
The following is an acid-base equlibrium problem that involves many of the topics we have discussed in chapters 17 and 18. For each of the following solutions:
- Describe (in words) what happens.
- Write a chemical equation that describes what happens.
- What is the proton donor? Why?
- What is the proton acceptor? Why
- After this solution has reached equlibrium: What species are present? What is their concentration? What is the pH and pOH?
- Benzoic Acid (C6H5COOH) is a solid. 15.000 grams is dissolved in distilled water and diluted to 200.00 mL.
- Sodium benzoate (NaC6H5COO) is a solid. Used as a preservative in most pop (or back east you call it soda). 10.000 grams is dissolved in distilled water and diluted to 100.00 mL.
- Sodium Hydroxide is a solid. 5.0000 grams is dissolved in 50.0 mL of distilled water.
- The benzoic acid solution and the sodium benzoate solution are mixed together in a large flask.
- 1.00 mL of the sodium hydroxide solution is added to the buffer.
- 10.00 mL of the sodium hydroxide solution is added to the buffer.
- 25.00 mL of the sodium hydroxide solution is added to the buffer.
Please send comments or suggestions to firstname.lastname@example.org
Scott Van Bramer
Department of Chemistry
Chester, PA 19013
© copyright 1996, S.E. Van Bramer
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Last Updated: Monday, December 23, 1996 10:31:14