| 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
POSTLAB QUESTIONS
1. a. In the standardization of NaOH, a student pipettes the H2SO4 above the mark on the pipette so that s(he) actually has slightly more than 10.00 mL of H2SO4. Then, the student titrates to a light pink color.
How would this affect the calculated molarity of NaOH?
| A. too large M of NaOH | B. too small M of NaOH | C. no effect on M of NaOH |
b. Explain (using equations for the calculations involved) your answer to part a.
2. a. When the initial burette reading was made, a student left the funnel in the burette. A drop of NaOH was suspended between the burette stem and the funnel. During the titration, the student remembered that the funnel was supposed to be removed and took out the funnel, allowing the drop of NaOH to fall into the burette. How would this affect the calculated molarity of NaOH from this titration data?
| A. too large M of NaOH | B. too small M of NaOH | C. no effect on M of NaOH |
b. Explain (using equations for the calculations involved) your answer to part a.
