Chemistry Essentials

Chemistry is the study of matter and its transformations. This module establishes the foundational language of the subject, from the classification of matter to the tools of measurement and the scientific method.

Atoms are the building blocks, and ions are their charged counterparts. This module explores the structure of the atom, the organization of the periodic table, and the systematic naming of the compounds they form.

Chemistry is a quantitative science. This module introduces the mole, the chemist's counting unit, and shows how to use it to relate masses, numbers of particles, and the concentrations of solutions.

Chemical reactions are the heart of chemistry. This module teaches how to write and balance chemical equations, classify reaction types, and perform stoichiometric calculations to predict the amounts of reactants and products.

Energy is the currency of chemical change. This module explores the concepts of heat, work, enthalpy, and calorimetry, providing the tools to quantify the energy changes that accompany reactions.

The properties of elements are a direct consequence of the arrangement of their electrons. This module delves into electronic structure, the quantum mechanical model, and how it explains the recurring patterns in the periodic table.

Atoms bond to form molecules with specific shapes and properties. This module covers the theories of chemical bonding, from Lewis structures to VSEPR theory, and explains how molecular geometry influences polarity.

Gases are the most fluid state of matter, and their behavior is remarkably predictable. This module explores the gas laws, the kinetic-molecular theory, and the intermolecular forces that govern liquids and solids.

Most chemical reactions occur in solution. This module examines the process of dissolution, the properties of solutions, and the factors that affect solubility, including the colligative properties.

Reactions don't happen instantly. This module explores the factors that influence reaction rates, the concept of rate laws, and the collision theory that explains how reactions occur at the molecular level.

Many reactions are reversible and reach a state of dynamic balance. This module introduces the concept of chemical equilibrium, the equilibrium constant, and Le Chatelier's principle for predicting how a system responds to change.

Acids and bases are everywhere, from the stomach to the ocean. This module covers the Brønsted-Lowry theory, pH calculations, buffer solutions, titrations, and the solubility equilibria of sparingly soluble salts.

Thermodynamics answers the ultimate question: will a reaction occur? This module explores the concepts of spontaneity, entropy, and free energy, providing the tools to predict the direction of chemical change.

Electrochemistry harnesses the power of electron transfer. This module covers redox reactions, galvanic cells, standard cell potentials, and the practical applications of batteries and electrolysis.

Carbon is the element of life, forming the backbone of an immense variety of molecules. This module introduces the basics of organic chemistry, including hydrocarbons, functional groups, and the principles of nuclear chemistry.