waec chemistry practical
Chemistry Practical WAEC EXAM 2026
In this post, I am going to show you how you can calculate the endpoint and concentration of acid in mole per dm 3 . so , if you are preparing to wr…
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exams
How to Calculate Empirical Formula: Step-by-Step Guide with Worked Examples
What Is an Empirical Formula? An empirical formula is the simplest whole-number ratio of the different atoms present in a compound. It does not s…
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stoichiometry
How to Calculate Percentage Purity in Chemistry (With Examples)
When working with chemicals in labs or exams, it’s important to remember that most substances aren’t 100% pure. The percentage purity tells us how…
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study Guide
Percentage Yield Explained: Formula, Examples, and Practice Questions
Percentage yield is one of the most important calculation topics in secondary school Chemistry. It appears regularly in WAEC, NECO , and JAMB exa…
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Studying
Gay-Lussac’s Law Explained: Combining Volumes of Gases With Simple Examples
When studying chemistry, one of the most fascinating aspects is how gases behave during chemical reactions. Even before scientists fully understood…
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stoichiometry
How to calculate Limiting and Excess Reagents
The calculation of limiting reagents and excess reagents is a real-life application of the stoichiometric relationship between reactants and products…
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Moles
Avogadro’s number and the mole concept
Matter has different types of particles, such as atoms, ions, molecules, etc. An element is made up of atoms. A mole is used to represent the …
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stoichiometry
Stoichiometry of Chemical Reaction involving Mass and Mole Part one
Stoichiometry is the study of the relationships which exist between reactants and products in a chemical reaction. This relationship can easil…
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stoichiometry
How to apply Gay-Lussac’s Law in chemistry calculations
Gay-Lussac’s Law explains the conditions that govern the combination of gases in a chemical reaction. This law states that gases react in volumes…
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