Lesson Plan | Technical Methodology | Organic Functions: Organic Salt

Objectives

Duration: 10 - 15 minutes

This stage aims to provide a clear understanding of the fundamental concepts related to organic salts, highlighting their formation, properties, and practical applications. The goal is to prepare students for practical experiences that simulate market situations, fostering the development of essential skills for future careers in the chemical field.

Main Objectives

1. Understand that organic salts are formed by the reaction of an inorganic base with a carboxylic acid.

2. Identify the properties and characteristics of organic salts.

Side Objectives

1. Relate the properties of organic salts to their practical applications in the job market.
2. Develop experimental skills in the synthesis and analysis of organic salts.

Introduction

Duration: 10 - 15 minutes

The purpose of this stage is to spark students' interest in the topic by contextualizing the importance of organic salts in real situations and the job market. By relating the content to practical applications, it seeks to motivate students to understand the relevance of the knowledge that will be addressed throughout the lesson.

Contextualization

Organic salts play a crucial role in various areas of chemistry and industry. They are formed by the reaction between carboxylic acids and inorganic bases, resulting in compounds with unique properties and varied applications. From food preservatives to cleaning agents, organic salts are present in our daily lives in ways that often go unnoticed. Understanding their formation and characteristics is essential for any student intending to pursue a career in the chemical field.

Curiosities and Market Connection

🔍 Curiosities and Market Connection: Organic salts are widely used in the food industry as preservatives, helping to extend the shelf life of food. In the pharmaceutical industry, they are components of many medicines, serving as buffering agents and stabilizers. Cleaning product companies use organic salts in detergent and soap formulations, due to their emulsifying and degreasing properties. The cosmetic industry also benefits from organic salts, especially in products like creams and lotions, where they act as emulsifiers and viscosity agents.

Initial Activity

🎬 Initial Activity: Show a short video (3-4 minutes) demonstrating the application of organic salts in different industries. After the video, ask a thought-provoking question: 'How do you think organic salts can impact sustainability in the food industry?' Ask students to briefly discuss in pairs and share their ideas with the class.

Development

Duration: 60 - 70 minutes

The purpose of this stage is to provide students with a practical and applied understanding of organic salts, developing their experimental skills and the ability to relate theoretical knowledge to real-life applications in the job market. Through the synthesis and analysis of organic salts, students will be able to directly observe the properties of these compounds and discuss their industrial uses.

Covered Topics

1. Formation of organic salts by the reaction of carboxylic acids with inorganic bases.
2. Physical and chemical properties of organic salts.
3. Practical applications of organic salts in the food, pharmaceutical, cleaning, and cosmetic industries.

Reflections on the Theme

Guide the students to reflect on how the knowledge of the properties and characteristics of organic salts can be applied in different areas of the industry. Ask: 'In what ways can the understanding of the properties of organic salts influence the development of new products in the food, pharmaceutical, cleaning, and cosmetic industries?'. Encourage them to think of concrete examples and to discuss in small groups.

Mini Challenge

Synthesis of Organic Salt in the Laboratory

Students will perform the synthesis of an organic salt from the reaction of a carboxylic acid with an inorganic base in the laboratory. They will then analyze the properties of the obtained salt.

Instructions

1. Divide the class into groups of 3 to 4 students.
2. Distribute the necessary materials: acetic acid, sodium hydroxide, beakers, stirrers, pH meter, filter paper, and precision scale.
3. Instruct the students to follow these steps:
4. Measure 50 mL of acetic acid and add it to a beaker.
5. Slowly add sodium hydroxide to the acetic acid while constantly stirring the solution.
6. Monitor the pH of the solution until it reaches approximately 7 (neutral), indicating the formation of sodium acetate.
7. Filter the solution to obtain the solid salt.
8. Research the physical and chemical properties of sodium acetate, such as melting point, solubility in water, and pH.
9. Compare the obtained results with the theoretical properties of sodium acetate.
10. Discuss in the group the possible applications of sodium acetate in the industry.

Objective: Develop practical skills in the laboratory, understand the formation of organic salts, and analyze their properties, relating them to industrial applications.

Duration: 40 - 45 minutes

Evaluation Exercises

1. Describe the process of forming an organic salt from a carboxylic acid and an inorganic base.
2. What are the main properties of organic salts? Provide examples.
3. Explain how organic salts can be used in the food industry.
4. List three applications of organic salts in the pharmaceutical industry and describe the function of each.
5. How do organic salts act in cleaning and cosmetic products? Give specific examples.

Conclusion

Duration: 15 - 20 minutes

The purpose of this stage is to consolidate the knowledge acquired by students, promoting reflection on learning and its practical applications. By recapping the main points and discussing the importance of organic salts, the goal is to ensure that students understand the relevance of the content addressed and its application in the job market.

Discussion

Promote an open discussion among students about the topics covered in the lesson. Encourage them to reflect on what they learned during the synthesis of organic salts, the observed properties, and the discussed industrial applications. Ask: 'How did today's practice help you better understand the formation and applications of organic salts?'. Facilitate the exchange of ideas and experiences, allowing students to share their perceptions and doubts.

Summary

Summarize and recap the main contents presented during the lesson. Highlight the formation of organic salts from the reaction of carboxylic acids with inorganic bases, the physical and chemical properties of these salts, and their diverse applications in the food, pharmaceutical, cleaning, and cosmetic industries. Remind the importance of understanding these concepts for future careers in the chemical field.

Closing

Explain how the lesson connected theory, practice, and the applications of organic salts. Emphasize the importance of the practical skills acquired in the laboratory and how they are essential for the job market. Conclude the lesson by highlighting the relevance of organic salts in everyday life and in the industry, reinforcing the importance of the knowledge gained.