Introduction and the concept of chemistry

Concept of chemistry

Chemistry is a branch of science that deals with the composition, structure, and properties of matter, as well as the changes it undergoes during chemical reactions.

Matter is anything that has mass and occupies space, and it includes all substances that make up our environment.

Chemistry is broadly classified into several branches:

1. Analytical Chemistry – Focuses on identifying, separating, and quantifying substances using specialized instruments and methods.
2. Inorganic Chemistry – Concerned with the properties and behavior of inorganic compounds, which typically do not contain carbon-hydrogen bonds.
3. Organic Chemistry – Deals with carbon-containing compounds, especially those with carbon-hydrogen bonds.
4. Physical Chemistry – Explores the relationship between physical properties of substances and their chemical composition and transformations.
5. Biochemistry – Studies the chemical processes in living organisms, linking biology and chemistry.

Chemists are scientists who study chemistry. They apply principles from other scientific fields such as physics, biology, and mathematics. Because chemistry is a practical and experimental science, chemists need to develop scientific skills, including:

1. Making careful and accurate observations.
2. Recording data and observations precisely.
3. Organizing information logically.
4. Repeating experiments to verify results.
5. Drawing conclusions based on evidence.
6. Predicting outcomes in similar situations.

Developing these skills helps students and professionals to think critically, logically, and systematically.

Items made through applications of chemistry

In everyday life, chemistry contributes to the creation of many common items. These can be grouped into two categories:

1. Items made through chemical processes, such as soaps, detergents, soft drinks, plastics, shoe polish, and cosmetics.
2. Items not made through chemical processes, such as soil, pen casings made from natural wood, or unprocessed foods.

Chemistry is important for our lives and development due to

1. It helps in manufacturing of medicine to cure sick people.
2. It helps in manufacturing of cooking oil and sugar in the food industry.
3. It helps in manufacturing of detergents like Omo, Foma etc. for cleaning.
4. It helps in manufacturing of fertilizers for agriculture.
5. It helps in manufacturing of chemical substances which kill weeds and pests.
6. It helps in manufacturing of fuel i.e. petrol, diesel.
7. It helps in manufacturing of shoes.
8. We study chemistry in order to start a career. For example, to be doctors, pharmacists, physicists, etc.
9. We study chemistry in order to answer questions about natural things i.e., why does iron rust?