Secondary 3 Chemistry – LearnSphere

About Course

This course is designed for Secondary 3 students taking Chemistry under the Singapore O-Level/ N-Level syllabus. It provides a strong foundation in essential chemistry concepts such as atomic structure, bonding, separation techniques, the mole concept, acids and bases, and more.

Through concise video lessons, printable worksheets, worked solutions, quizzes, and on-demand AI tutor support, this course helps students strengthen conceptual understanding, develop analytical thinking, and apply knowledge to real-world problems.

Master foundational chemistry concepts aligned with the O-Level and N-Level syllabus
Understand particle theory, atomic structure, and bonding
Learn key laboratory techniques and data interpretation
Apply chemical formulas and balance equations accurately
Perform mole calculations and stoichiometry
Gain confidence in salt preparation and qualitative analysis
Build conceptual clarity with step-by-step guided practice

Course Content

Experimental Chemistry
This topic introduces students to laboratory techniques, apparatus, and practices essential for conducting scientific experiments safely and accurately.

Measurements and Apparatus

The Particulate Nature of Matter
Explore the fundamental idea that matter is composed of particles and how this model explains physical phenomena.

Separation and Purification
This topic focuses on techniques for separating mixtures based on physical properties.

Elements, Compounds and Mixtures
Gain a clear understanding of atomic structures and how atoms combine to form compounds and mixtures.

Atomic Structure
Study the basic structure of atoms and the role of subatomic particles in chemical behavior.

Chemical Bonding
Understand how atoms combine through different bonding types to achieve stable electronic structures.

Writing Chemical Formulae and Equations
This topic introduces students to chemical symbols, formulas, and balanced equations representing reactions.

The Mole Concept and Stoichiometry
Gain foundational skills in quantitative chemistry through the concept of the mole and calculations involving mass, volume, and concentration.

Acids, Bases, and Salts
Explore the chemical nature of acids and bases, how they interact, and methods to prepare different salts.

Qualitative Analysis
This topic introduces basic qualitative tests for common gases and ions encountered in chemistry.

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About Course

What Will You Learn?

Course Content

Experimental Chemistry This topic introduces students to laboratory techniques, apparatus, and practices essential for conducting scientific experiments safely and accurately.

The Particulate Nature of Matter Explore the fundamental idea that matter is composed of particles and how this model explains physical phenomena.

Separation and Purification This topic focuses on techniques for separating mixtures based on physical properties.

Elements, Compounds and Mixtures Gain a clear understanding of atomic structures and how atoms combine to form compounds and mixtures.

Atomic Structure Study the basic structure of atoms and the role of subatomic particles in chemical behavior.

Chemical Bonding Understand how atoms combine through different bonding types to achieve stable electronic structures.

Writing Chemical Formulae and Equations This topic introduces students to chemical symbols, formulas, and balanced equations representing reactions.

The Mole Concept and Stoichiometry Gain foundational skills in quantitative chemistry through the concept of the mole and calculations involving mass, volume, and concentration.

Acids, Bases, and Salts Explore the chemical nature of acids and bases, how they interact, and methods to prepare different salts.

Qualitative Analysis This topic introduces basic qualitative tests for common gases and ions encountered in chemistry.