Keeping Up with Focus Chemistry

Stoichiometry Part III: Tackling Redox Stoichiometry

Stoichiometry Part III: Tackling Redox Stoichiometry

A common type of question in A-level Chemistry Preliminary Exams is redox calculation questions. This type of question usually appears in Paper 1 (MCQ) which allows only 1.5 minutes to... Read More
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Chemical Equilibria Part II: The Truth Behind Le Chatelier’s Principle: Temperature effect

Chemical Equilibria Part II: The Truth Behind Le Chatelier’s Principle: Temperature effect

Click here to read Chemical Equilibria Part I: Tackling standard A Level / Prelims examination questions Le Chatelier’s Principle was first taught in secondary schools, and delved deeper in A... Read More
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Chemistry of Aqueous Solutions – Acids and Bases Part I

Chemistry of Aqueous Solutions – Acids and Bases Part I

Chemistry of Aqueous Solutions is usually one of the BIGGEST FEAR many A-level students have, reason being that schools introduce too many jargons and concepts, such that students cannot filter out the... Read More
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Energetics and Thermodynamics Part I: Hess’ Law and Energy Cycles

Energetics and Thermodynamics Part I: Hess’ Law and Energy Cycles

  One of the most daunting task in the chapter of Energetics and Thermodynamics in A level H2 Chemistry is the construction of energy cycles and energy level diagrams. In... Read More
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Chemical Equilibria Part I: Tackling standard A Level / Prelims examination questions

Chemical Equilibria Part I: Tackling standard A Level / Prelims examination questions

  Chemical Equilibria is usually taught before Chemistry of Aqueous Solutions in junior colleges, though there are schools would do Chemical Equilibria in the 1st year, and Chemistry of Aqueous... Read More
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Stoichiometry Part II: Tackling interesting A Level Chemistry Prelim Question: Gases

Stoichiometry Part II: Tackling interesting A Level Chemistry Prelim Question: Gases

In this section, we shall look at a few past year MCQ questions from top JCs. In the A levels Chemistry, the MCQ paper (paper 1) is a 40-question paper,... Read More
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Stoichiometry Part I: Tackling standard A Level / Prelims examination questions

Stoichiometry Part I: Tackling standard A Level / Prelims examination questions

Stoichiometry and mole concept have been covered in the O levels and is redone during the first few months of Junior College (JC) Chemistry during the first year. Therefore, many... Read More
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Prussian Blue… What is it?

Prussian Blue… What is it?

The discovery of Prussian blue is credited to a German paint maker called Diesbach in 1706. Diesbach, who worked in Berlin, was attempting to create cochineal red lake in his laboratory.... Read More
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A-level Chemistry Tuition

A-level Chemistry Tuition

  A 2012 article in Slate about science education highlight’s Singapore’s ascendance to the ranks of those elite countries with the highest-quality science education in the world. In the article, Dr. Charles... Read More
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