Lesson 1
Topic of laboratory work: How antacids work
The purpose of the work:
Study the neutralization process using the example of antacids
Learning outcomes:
Students know about the process of neutralization
Students know how antacids work
Teacher’s guide:
Tasks are performed in groups of 2-3 people
Prepare 0.01 M hydrochloric acid in advance
Worksheet
Safety technique
Description
Neutralization is a fundamental chemical process that occurs when an acid and a base react to produce water and salt, resulting in the neutralization of their acidic or basic properties. This reaction is a classic example of how chemistry plays a vital role in our everyday lives. When an acid and a base come into contact, they cancel out each other’s effects, leading to the formation of a more neutral solution.
One prominent instance of neutralization occurs in the human body, particularly in the stomach. The stomach is home to a powerful acid known as hydrochloric acid (HCl). Its primary role is to aid in the digestion of food by breaking down proteins and killing harmful microorganisms that may enter the digestive system. However, an excess of stomach acid can lead to discomfort and conditions like acid reflux and heartburn.
To combat the discomfort caused by excess stomach acid, many individuals turn to antacids. Antacids are medications specifically designed to neutralize the excessive acidity in the stomach. They typically contain bases, such as magnesium hydroxide or calcium carbonate, that react with the excess hydrochloric acid. When you consume an antacid, it works by undergoing a neutralization reaction with the stomach acid, forming water, salt, and carbon dioxide. This process helps to raise the pH of the stomach, reducing the acidity and providing relief from heartburn and indigestion.
List of necessary equipment
- Red cabbage indicator
- Antacid (Maalox Plus)
- Test tubes
- Measuring cylinder
- Hydrochloric acid (0.01 M)
- Mortar
Practical part
1) Measure 10 ml of hydrochloric acid into test tubes
2) Take one antacid tablet and crush it in a mortar and pour the contents into one of the test tubes
3) Now add a little indicator to each test tube and observe the result
Conclusion
Thus, you have learned about the role of neutralization for humans. You also learned how antacids work. It is these basic processes that take place in your stomach if you take antacids.
Rules for designing the laboratory work
The laboratory work should contain items in the following order:
- Laboratory work number
- Topic name
- Purpose of the work
- Hypothesis
- Brief description of the theoretical part
- Equipment
- Steps in the correct sequence
- Add a photo from the experiment (if you can’t insert a photo, you can add a picture)
- Give a brief description
- Write a brief discussion and explanation of the topic covered
- Write the conclusion of the work
- The workplace must be cleaned and put in order
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