Some Important Chemical Reactions you should know (O level chemistry) Ionisation of elements Ionisation of Group 1 elements (alkaline metals) Atoms of Group 1 elements have 1 electron in the outer shell, so they ionise by losing 1 electron to form a positively charged ion of charge +1. This is oxidation because it involves loss …
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How to use the periodic table In this post we are going to discuss on how to use the Periodic Table. To a random person, the Periodic Table might look like just an orderly arrangement of atoms but to a chemist, the Periodic Table is the summary of chemistry. The Period Table shows us: names …
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Preparation of Salts (O level Chemistry) Preparation of salts depends on the physical and chemical properties of the salt. For example, when choosing the best method to prepare a salt you need to consider the following: is the salt soluble? If yes, we usually prepare it by neutralisation of acid and carbonate or acid and …
What is a salt? A salt is a substance formed when the hydrogen of an acid is replaced by a metal. Three common ways of making a salt: When an acid neutralise a base or an alkalis. For example, sulphuric acid neutralises sodium hydroxide (an alkali) to produce sodium sulphate (a salt) and water. H2SO4(aq) …
Writing ionic equations Writing ionic equations is one of the most challenging aspects of O level chemistry. Topics such as Redox and electrochemistry required the student to have detailed information on how to write ionic equations. Also as the student progresses from O level to A level, ions and ionic equation gradually become the pivot …
Writing Balanced Chemical Equations Writing balanced chemical equations is one of the most challenging aspects of O level chemistry. O level Chemistry fundamentally revolves around calculations, symbols and formula of chemical substances. This tutorial is about balancing chemical equations but before we start balancing chemical equations we are going to start by learning how to …
Uses of common elements and compounds This is a list of commonly asked uses of substances in O level Chemistry and Combined Science exams. Uses of oxygen Medical purposes – In hospitals, oxygen is given to some people who are injured or ill with disease that damage the lungs and stop them from absorbing oxygen …