Contextualization

Theoretical Introduction

Salts are chemical compounds formed by the reaction of an acid with a base. They are commonly found in our daily routine, with table salt, or sodium chloride (NaCl), being the most well-known. Learning to name salts correctly is fundamental for the study of chemistry, as it helps us understand the composition of these substances and their properties.

In the nomenclature of salts, the cation (positive ion) always comes first, followed by the anion (negative ion). The name is usually derived from the base of origin of the salt, and the anion is named according to its parent acid.

For example, when the base sodium hydroxide (NaOH) reacts with hydrochloric acid (HCl), sodium chloride (NaCl) is produced. Thus, the nomenclature of salts gives us an insight into the compounds that reacted to produce the salt.

Contextualization

Salts play a critical role in many aspects of our daily life and the world around us. For example, sodium chloride is an essential component in our diet, regulating the amount of fluids in our bodies and aiding in the transmission of nerve signals.

Furthermore, salts are widely used in industry. For instance, ammonium nitrate (NH₄NO₃) is a common salt used as a large-scale fertilizer to provide nitrogen to plants. In the pharmaceutical industry, different salts are used in the production of medicines.

Therefore, understanding the nomenclature of salts is essential to appreciate and participate in these and many other practical applications in industry and daily life.

Practical Activity

Activity Title: "Building and Naming Salts"

Project Objective

This project aims to have students research the nomenclature of salts, produce a three-dimensional model of a salt, and create an explanatory poster.

Detailed Project Description

Students will be divided into groups of 3 to 5 people. Each group will be responsible for choosing a salt, researching its nomenclature and uses, creating a 3D model of the chosen salt, and an explanatory poster.

The estimated time for completing this activity is two to four hours per participating student, and the deadline for submission is one week.

Required Materials

1. Materials for building the three-dimensional model (styrofoam, modeling clay, barbecue sticks, etc.)
2. Cardboard or cardstock for the poster
3. Colored pens, pencils, markers
4. Computers or devices with internet access for research

Detailed Activity Steps

1. Research: Each group must choose a salt and research its nomenclature, formulation, and uses. This information should be gathered and recorded to be used on the poster.
2. Construction of the 3D Model: Using the available materials, students must create a three-dimensional model of the chosen salt, representing its composition. This model should be accurate and visually identifiable.
3. Creation of the Poster: The poster should include the name of the salt, the chemical formula, the graphical representation, information about its nomenclature, and some of its most common uses. The poster should be clear and visually appealing.
4. Presentation: The group must present their salt, explaining the nomenclature, showing the 3D model, and explaining what is on the poster.

Project Deliverables

Each group must deliver:

1. The 3D model of the salt
2. The explanatory poster

Additionally, each group must write a report containing:

• Introduction: Provide context for the theme, its relevance and real-world application, and the objective of this project.
• Development: Explain the theory behind the central theme of the project, detail the activity, indicate the methodology used, and present and discuss the results obtained.
• Conclusion: Summarize the main points of the work, explain the learnings obtained, and draw conclusions about the project.
• Bibliography: List the sources used to work on the project such as books, web pages, videos, etc.

These deliveries should be made collaboratively, using time management skills, effective communication, and problem-solving abilities.