Welcome to Free Chemistry Online
This website provides free
chemistry courses primarily to high school students. College students in their
first year will also find the tutorials useful for the first two semester
The courses on this website
are created and provided online by qualified and experienced chemistry tutors
whose passion for the teaching of chemistry, and for all students to have free
access to quality tutorials, is second to known.
These are specially
designed courses to help you gain in-depth knowledge and understanding of chemistry and
prepare you adequately for high school chemistry examinations and tests. Every
aspect of each topic is brought out, explained, and all relevant points
highlighted. The language is flowing and easy to comprehend.
You will be able to have a
deeper understand and appreciation of the relationship between Chemistry and
other disciplines; the basic principles governing scientific methods; the
interpretation of scientific methods; and the application of the knowledge of
chemistry in industry and daily activities of man.
What is Chemistry?
Chemistry is a branch of
physical science that deals with the composition and properties of matter. It
looks into the chemical changes that occur between different substances and from
the knowledge of the properties of the substances involved, it can explain what
Also, from the knowledge of
chemical properties of substances, it is possible to predict the kind of
chemical reactions that will occur between different substances under certain
conditions, and the new substances that will be formed from such reactions.
Chemistry, therefore does not
only allow us to understand the properties of matter, but it also gives us the
ability to manipulate matter to get the desired outcome or products.
Chemistry has no doubt helped
to create countless diverse and valuable products upon which great industries
have been established in many countries, providing jobs to millions of people.
Some of such industries include the petrochemical, chemical, pharmaceuticals,
food processing, and fragrance industries.
For the fact that chemistry
studies the composition and properties of matter, it is therefore a fundamental
subject in science. You will not be able to take a degree in biological courses,
medicine, physics, engineering, geology, and earth science without studying
chemistry. This is why chemistry is usually referred to as the "central science"
- it connects biology and medicine, physics and mathematics, and the earth
and environmental sciences.
It provides explanations to
many physical and biological phenomena. Therefore, the knowledge of chemistry is
important because it helps us to better understand our physical world.
Why Study Chemistry?
The study of chemistry helps us
to understand our world better and to make the right decisions in almost all our
When you are cooking, you are
actually carrying out a chemical reaction. The ingredients are mixed up in
certain proportions and cooked together to produce the tasty food. Your
understanding of the chemical composition and properties of the ingredients will
definitely make you a better cook. In fact, this is the reason you will have to
take chemistry courses if you are studying to be a cook.
Everything around us is a
chemical substance which can undergo reactions or change with others. For
instance, apples, potatoes, pears, peaches, and bananas when cut or bruised will
form a brown color on the surface in a few minutes. You may have been observing
this, but may not have known that the cause of the brown color is a chemical
reaction which takes place between the oxygen of the air and some chemical
substances in the apple and the other produce.
The knowledge of this chemistry
will not only enable you to understand the chemical reaction involved, but also
to prevent it from happening if you don't want the brown color, or to promote it
if you like it. Read more on
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