| 1. | Safety |
| 2. |
Objectives/Overview |
| 3. |
Procedures |
|
4. |
Observations |
| 5. | |
| 6. | |
| 7. | |
| 8. | Conclusions |
| 9. | Grading Scale |
| 10. | Review Prelab Questions |
|
11. |
Review Postlab Questions |
Experiment
19
Qualitative
Cation Analysis
PRE-LABORATORY QUESTIONS
References:
Brown, Lemay, and Bursten
Chemistry the Central Science, 8th ed. (2000)
pp. 109-113 (solubility, precipation reactions,ionic equations)
pp. 117-119 (neutralization reactions)
pp. 593-618 (strong and weak acids and bases, pH)
pp. 621-622 (pH effects of salts)
pp. 644-650 (buffers)
pp. 659-669 (solubility and Ksp)
pp. 669-674 (separation of metallic ions via precipitation and solubility
criteria).
Learning
Center:
SSM Lesson 5 (net ionic equations)
Writing NIE; solving "who-dun-its" (study guides); answers
to pre- and post-lab questions
a. Fe(OH)3(s) + HCl(aq) -->
b. Ca2+(aq) + (NH4)2CO3(aq) -->
c. Cr3+(aq) + NH3(aq) -->
2. List all of the Group III, IV, and V cations that correspond to
the following:
a. Does not precipitate when treated with a buffered NH3 solution or when treated with (NH4)2CO3.
b. A group III cation that will dissolve in excess concentrated NaOH solution.
