Lesson
Purpose of the work:
- To experimentally confirm the basic chemical properties of acetic acid.
- To study the interaction of acetic acid with various substances.
- To learn how to conduct qualitative reactions to acids.
Expected results:
After completing the work, students can:
- develop teamwork skills
- be able to analyze and summarize the information received
- draw logical conclusions
Teacher’s Guide:
- The task is performed in groups of 3-4 people
- Before starting laboratory work, please read the safety rules by following the link:
- To download the worksheet, follow the link:
Theoretical part
Acetic acid (CH₃COOH) is an organic compound commonly found in vinegar. It has a distinctive sour taste and a pungent odor. Like other acids, acetic acid reacts with metals, bases, and salts. In this experiment, we will investigate some of these properties.
Practical part
Experiment #1. The interaction of acetic acid with the indicator.
Step 1. Add 2 ml of acetic acid to one of the test tubes.
Step 2. Add a few drops of the indicator.
Step 3. Observe the color change.
Experiment #2. The interaction of acetic acid with metal.
Step 4. Place a small metal bolt in the test tube.
Step 5. Add acetic acid.
Step 6. Observe the changes that are taking place.
Experiment 3. The interaction of acetic acid with salt.
Step 7. Place a small amount of washing soda (calcium carbonate) in a test tube.
Step 8. Add a few drops of acetic acid.
Step 9. Observe the changes that are taking place.
Complete the table in the Worksheet:
Table 1.
| Experiment № | Chemical equation | Observations | Conclusion |
1 | |||
2 | |||
3 |
Conclusion
During the experiment, students studied the chemical properties of acetic acid. These experiments allowed them to verify that acetic acid has the characteristic properties of acids and actively interacts with various substances.