| 1. | Safety |
| 2. |
Objectives/Overview |
| 3. |
Procedures |
| 4. | Observations |
|
5. |
Equipment |
| 6. | View
Techniques: |
| 7. | Sample Calculations |
| 8. | |
| 9. | Calculations/Set-ups |
| 10. | Conclusions |
| 11. | Grading Scale |
|
12. |
Review Prelab Questions |
| 13. | Review Postlab Questions |
- Experiment
5
Standardization
of NaOH by Titration
OBJECTIVES
An aqueous NaOH base solution (~0.3 M) will be prepared by dilution of a more concentrated base solution and then standardized (i.e. determine its concentration accurately) by titrating it against a sulfuric acid solution of known concentration (i.e. 0.5000 M).
OVERVIEW
In this experiment you will learn how to:
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Prepare solutions by dilution utilizing the equation:
Mi x Vi = Mf x Vf
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Perform acid-base titrations to standardize (i.e. determine a concentration accurately) an unknown base solution. A titration involves the gradual and measured addition of a titrant from a burette to a solution with which it reacts. The endpoint is often signified by a color change of an indicator.
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Perform solution stoichiometry calculations to determine the molarity of the unknown base solution using titration data and the balanced chemical equation for the titration:2NaOH + H2SO4 -> 2H2O + Na2SO4.
