Chemistry

Chemistry makes more sense when you can see the connections.

Clear explanations, helpful examples, and purposeful practice for the Chemistry concepts students are expected to understand.

Chemistry Library

Explore Chemistry by topic.

Start with a concept you are learning now, or explore related topics to build a stronger understanding of Chemistry.

Matter & Measurement

Properties of Matter Explore physical and chemical properties, intensive and extensive properties, and the ways chemists describe matter. → Physical & Chemical Changes Distinguish physical changes from chemical reactions and identify evidence that a new substance has formed. →

Atomic Structure

Atomic Structure Understand protons, neutrons, electrons, isotopes, ions, and how the structure of an atom determines its identity. → Electron Configuration Explore how electrons are arranged in energy levels, sublevels, and orbitals. → Periodic Trends Understand atomic radius, ionization energy, electronegativity, and other trends across the periodic table. →

Chemical Bonding

Ionic, Covalent & Metallic Bonding Compare the major types of chemical bonding and connect bonding models to the properties of substances. → Lewis Structures Learn how Lewis structures represent valence electrons, bonding, lone pairs, and molecular structure. → VSEPR Theory Use electron-domain repulsion to predict molecular shapes, bond angles, and three-dimensional structure. → Intermolecular Forces Explore London dispersion forces, dipole-dipole interactions, hydrogen bonding, and how intermolecular forces affect properties. →

Stoichiometry

Moles & Molar Mass Connect particles, moles, mass, and molar mass to solve quantitative Chemistry problems. → Stoichiometry Use balanced chemical equations and mole relationships to calculate amounts of reactants and products. → Limiting Reactants Determine which reactant limits a chemical reaction and calculate the amount of product that can form. →

Gases

Gas Laws Explore the relationships among pressure, volume, temperature, and amount of gas. → Ideal Gas Law Use PV = nRT to connect pressure, volume, temperature, and moles of an ideal gas. →

Solutions, Acids & Bases

Solutions & Concentration Understand solutes, solvents, concentration, molarity, and the behavior of substances in solution. → Properties of Acids & Bases Explore the characteristic properties of acids and bases and how they behave in aqueous solutions. → Arrhenius, Brønsted-Lowry & Lewis Acids and Bases Compare three major models used to describe acids, bases, proton transfer, and electron-pair behavior. →

Thermochemistry

Thermochemistry Explore energy changes in chemical reactions, heat transfer, enthalpy, and the relationship between energy and chemical change. → Calorimetry Use temperature changes and heat capacity to investigate energy transfer during chemical and physical processes. →

Kinetics & Equilibrium

Chemical Kinetics Explore reaction rates, collision theory, activation energy, and the factors that affect how quickly reactions occur. → Chemical Equilibrium Understand dynamic equilibrium, equilibrium expressions, and how reversible reactions behave. → Le Châtelier's Principle Predict how changes in concentration, pressure, temperature, and other conditions affect equilibrium systems. →

Electrochemistry

Electrochemistry Explore oxidation-reduction reactions, electron transfer, electrochemical cells, and the relationship between chemistry and electricity. → Oxidation-Reduction Reactions Identify oxidation and reduction, track electron transfer, and recognize oxidizing and reducing agents. →
More Chemistry topics will be added as the library grows. The goal is to build a useful collection of clear, connected Chemistry explanations rather than a fixed list of every possible Chemistry topic.
Need a little more help?

Sometimes you just need someone to explain it differently.

One-on-one Biology and Chemistry tutoring with an experienced high school science teacher. Personalized support for academic, honors, AP, and IB students.

Learn about tutoring →