Contextualization

Theoretical Introduction

Oxides are binary chemical compounds, that is, they are formed by two different chemical elements, one of which is always oxygen. This means that oxides are formed by bonds between oxygen atoms and atoms of another chemical element. This type of compounds is very abundant and important in the Earth's crust, as they are all around us in various contexts and situations.

Oxides can be classified in various ways, depending on their physical or chemical characteristics, but the two main classifications are: basic oxides and acidic oxides. Basic oxides are those that, when dissolved in water, form a base. Acidic oxides, on the other hand, when dissolved in water, form an acid.

Now, we can delve a little deeper into the concepts. Basic oxides are usually formed by metals with low electronegativity. Acidic oxides are usually formed by non-metals with high electronegativity. There are also amphoteric oxides that, depending on the medium, can behave as basic oxides or acidic oxides, and neutral oxides that are generally gases at room temperature and do not react with water, acids, and bases.

Contextualization

Oxides are extremely present in our daily lives. Some common examples are carbon dioxide (CO2), mainly responsible for the greenhouse effect, and aluminum oxide (Al2O3), a major component in the manufacturing of soda and beer cans and used as a thermal insulator. The famous rust, which damages metals, is an example of an oxide that forms in the presence of water.

In addition, oxides are present in industry, research, the environment, medicine, among others, showing the relevance of understanding these compounds in various areas of life. Therefore, it is essential to understand how oxides are formed, their properties, and their classification.

Practical Activity

Activity Title: "Exploring the World of Oxides"

Project Objective

In this project, you and your group will be scientists exploring the fascinating world of oxides. You will identify and classify different oxides, as well as carry out practical experiments to understand how these compounds react in different situations. The goal is for you to apply the theoretical concepts learned in class and experience in practice the occurrence and importance of oxides in our daily lives.

Detailed Project Description

The project will be carried out in groups of 3 to 5 students and will last one week. The activity will be divided into two parts:

Part 1: Research and Identification of Oxides

Students should research and identify at least five different oxides that are present in our daily lives. Each oxide must be classified as basic, acidic, amphoteric, or neutral, and the groups must justify this classification.

Part 2: Practical Experiments with Oxides

The groups should choose one of the identified oxides to carry out a practical experiment. The experiment must be safe and feasible to be carried out at home or at school, under adult supervision. The reactions should be observed and the results recorded for further analysis.

Required Materials

These will depend on the chosen oxide and the experiment to be carried out. The groups must list and justify the need for each item in their report.

Step by Step

1. Formation of groups and distribution of tasks.
2. Research on oxides present in our daily lives.
3. Classification of the identified oxides.
4. Selection of an oxide for the practical experiment.
5. Planning and execution of the experiment.
6. Detailed notes on the observations made during the experiment.
7. Analysis of the results and conclusions.
8. Preparation of the report.
9. Review of the report by the group.
10. Final submission of the report.

Project Deliverables

At the end of the week, each group must submit a written report containing the following sections:

1. Introduction: Presentation of the project's objective, contextualization of the importance of oxides, and description of the chosen oxide(s).
2. Development: Details of the research and identification process of the oxides, explanation of the classification assigned to each oxide, and detailed description of the experiment carried out, including the list of materials used, the procedure adopted, and the justification for the choice of this methodology. Presentation and discussion of the results obtained.
3. Conclusion: Elucidation of the main learnings obtained, conclusions drawn about the project, and the importance of the theme of oxides in our daily lives.
4. Bibliography: Citation of the sources they relied on to work on the project such as books, web pages, videos, etc.

It is important that the report be written in a clear and objective manner, with truthful information and academic language. Images, graphs, and tables are welcome to help present the results obtained.

Remember that group work requires responsibility, participation, and collaboration from all members. Each of you plays an important role in the execution of this project!