Free online courseChemistry

Course Description

Chemistry can feel like a different language at first: symbols, formulas, tiny particles you cannot see, and math that seems to appear out of nowhere. This free online course helps you translate it all into clear ideas you can actually use. Instead of memorizing disconnected facts, you will learn how chemists think—how atoms explain properties, how patterns in the periodic table predict behavior, and how a balanced equation becomes a reliable tool for solving real problems.

You will build a strong foundation starting from elements, atoms, ions, and electron structure, then connect that structure to bonding and the shapes and formulas of substances. As your understanding grows, you will practice turning chemical relationships into calculations: working with the mole and Avogadro’s number, moving between mass and composition, and making sense of stoichiometry so you can predict amounts of reactants and products with confidence. Along the way, the course steadily strengthens the problem-solving habits that matter most in school and exam settings.

The course also guides you through big, high-impact topics that often determine whether chemistry feels manageable or overwhelming. You will learn how gases behave using the ideal gas equation and partial pressures, how states of matter and intermolecular forces shape boiling points and solubility, and how equilibrium connects to reaction direction through ideas like Q and K. Acids and bases become more intuitive with pH, pKa, buffers, and titration reasoning that focuses on understanding rather than shortcuts.

To round out the picture, you will explore kinetics, oxidation states and redox reactions, electrochemical cells, nuclear decay, and the thermodynamics behind energy, spontaneity, entropy, and free energy. With guided videos and targeted exercises, this course is designed to help you study more effectively, improve grades, and prepare for standardized chemistry exams—at your own pace, from anywhere.