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Chemistry

Classwork Series and Exercises {Chemistry – SS2}: Introduction to Organic Chemistry

Chemistry, SS 2 Week: 1 Topic: Introduction to Organic Chemistry Organic chemistry originally meant the chemistry of compounds obtainable from plants and animals – living organisms. Organic chemistry is that branch of chemistry that deals with the structure, properties, and reactions of compounds that contain carbon. In other word, organic chemistry is defined as the [...]

Classwork Series and Exercises {Chemistry- SS2}: Electrochemistry

Introduction Electrochemistry is the study of electricity and how it relates to chemical reactions. In electrochemistry, electricity can be generated by movements of electrons from one element to another in a reaction known as redox reaction, or oxidation-reduction reaction.  In other word, electrochemistry is the study of changes that cause electrons to move. This movement [...]

Classwork Series and Exercises {Chemistry – SS2}: Alloy

Chemistry SS 3 Week 6 Topic: Alloy Introduction Many of the pure metals are not widely used because of their properties such as hardness, tensile strength, resistance to corrosion and lustre can be improved by combining them with other element. The mixtures are known as alloys. An alloy is a mixture of two or more [...]

If STEM Education Is the Future, What Must Students Do To Be Successful At It?

If you are observant, you would have come across the word STEM; be it on radio, TV or the internet. What exactly is it? Why is it everyone talking about it? Why is is so important for students? And how can they be successful at it. Put simply, STEM means Science, Technology, Engineering and Mathematics. [...]

Classwork Series and Exercises {Chemistry- SS2}: Periodic Table

Introduction The most important classification in chemistry is the arrangement of the elements in the periodic table. In 1869, Mendeleev, a Russian scientist, was the first to construct a periodic table. He arranged the elements in order of increasing relative atomic mass. He pointed out that elements with similar properties kept recurring at regular intervals [...]

Classwork Series and Exercises {Chemistry – SS1}: Halogens

Chemistry SS 2 Week 1 Topic: Halogens Introduction The halogens are the collective name given to the elements in group VII of the Periodic Table. There are five halogens; fluorine, chlorine, bromine, iodine and astatine. Astatine is very radioactive and cannot exist for more than a few microseconds before decaying. We will thus be concerned [...]

How To Use/Not Use Bleach And Other Household Cleaning Agents

Bleach is the common name for a solution of 2.5% sodium hypochlorite in water. It's also called chlorine bleach or liquid bleach, and another type of bleach is oxygen-based or peroxide bleach. While you may know bleach is used to disinfect and remove stains, there is more to know about this everyday chemical to use [...]

Classwork Series and Exercises {Chemistry – SS2}: Oxides of Nitrogen

Chemistry SS 2 Week 6 Topic: Oxides of Nitrogen Types of Nitrogen Oxides Oxides of nitrogen provide a fascinating picture from the point of view of their varied structures and diverse chemical behaviour. They range from N2O (oxidation state of nitrogen +1) through NO, N2O3, NO2, N2O4 to N2O5 in which the oxidation state of [...]

Chemistry Terms and Their Meanings {D & E}

Continuation of Chemistry terms, Letters D and E...... D Dative Bond - A dative bond is a covalent bond between two atoms where one of the atoms provides both electrons that form the bond. Decantation - Decantation is a process to separate mixtures. Decanting is done to separate particulates from a liquid by allowing the [...]

Classwork Series and Exercises {Chemistry – SS2}: Compound of Nitrogen (Ammonia)

Chemistry SS 2 Week 5 Topic: Compound of Nitrogen (Ammonia) Introduction Ammonia was earlier known by the name "alkaline air." It was identified in 1716 by J. Kunckel. It was prepared in a lab for the first time by Joseph Priestly in 1774. Although Claude Berthelot studied the chemical composition of the gas in 1785, [...]

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