| 1. | Safety |
| 2. |
Objectives/Overview |
| 3. |
Procedures |
|
4. |
Observations |
| 5. | |
| 6. | |
| 7. | |
| 8. | Conclusions |
| 9. | Calculations/Set-Ups |
| 10. | Grading Scale |
| 11. | Review Prelab Questions |
|
12. |
Review Postlab Questions |
Experiment
18
Exploring Buffers: The Ionization Constant of an Unknown Acid
POSTLAB QUESTIONS
1A.
Using your graph determine the pH of a solution containing 5.58 mL
0.100 M acid and 12.13 mL 0.100 M salt. (Show all calculations!)
pH = ________________________
2 A. Use HX to represent your acid and X- to represent the conjugate base.
a. Write a net ionic equation for the reaction that would occur if you added HCl to one of your mixtures.
b. Explain what will happen to the pH of the mixture with the addition of HCl?
c. Compare the pH change in the mixture (2b above) to what you think will happen when HCl is added to pure water.
