ChemixaLEARN CHEMISTRY

General Chemistry Complete Path

High School to Introductory College⏱ ~60 hours10 modules

This path mirrors a full year of high school chemistry or a first college semester of general chemistry. It runs in dependency order: measurement skills first, then atomic structure, then the periodic table, then bonding — and only after that the big applied topics (gases, energy, rates, equilibrium, acids, electrochemistry) that rest on those foundations. Each module pairs explanatory articles with targeted practice so no calculation skill is left untested. Checkpoint discipline applies throughout: do not advance until you can solve that module's practice set at 80 percent or better without notes, because every later module silently assumes those skills.

Module 1: Foundations: Matter and Measurement

Set the groundwork: the nature of matter, how chemists measure and report numbers honestly, and dimensional analysis — the unit-cancellation method behind every chemistry calculation. Checkpoint: solve 10 dimensional-analysis conversions with correct units and significant figures.

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Module 2: Atomic Structure

Go inside the atom: protons, neutrons, electrons, isotopes, and the electron configurations that explain chemical behavior. Checkpoint: write electron configurations for the first 36 elements and explain what isotopes are.

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Practice

Module 3: The Periodic Table

Learn to read the table's organization — groups and periods — and master the three great periodic trends in size, ionization energy, and electronegativity. Checkpoint: predict the ordering of 5 elements by radius, ionization energy, and electronegativity without the table.

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Module 4: Chemical Bonding

How atoms join: ionic and covalent bonding, drawing Lewis structures, and using VSEPR theory to predict molecular shapes. Checkpoint: draw correct Lewis structures and name the geometry for 8 molecules.

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Module 5: Gases

The gas laws as a story of pressure, volume, temperature, and moles — from Boyle and Charles through the ideal gas law to mixtures of gases and partial pressures. Checkpoint: solve mixed gas-law problems including Kelvin conversions with 90 percent accuracy.

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Module 6: Thermochemistry

Energy flow in reactions: what enthalpy measures, how Hess's law adds reaction steps, and how Gibbs free energy predicts spontaneity. Checkpoint: compute ΔH° by formation data and Hess's law, then use ΔG to classify 5 reactions as spontaneous or not.

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Module 7: Chemical Kinetics

Why some reactions are fast and others slow: reaction rates, rate laws, reaction order, and the role of activation energy as the energy barrier. Checkpoint: determine reaction orders from experimental data and write the rate law.

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Module 8: Chemical Equilibrium

Dynamic equilibrium and the equilibrium constant, calculating equilibrium concentrations with ICE tables, and predicting shifts with Le Chatelier's principle. Checkpoint: set up and solve 3 ICE-table problems and predict shift direction for 5 stress scenarios.

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Module 9: Acids and Bases

The three acid-base models, the pH scale, and the practical chemistry of titrations that lets chemists measure unknown concentrations. Checkpoint: calculate pH for strong acids and bases and describe what happens at a titration's equivalence point.

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Module 10: Electrochemistry

Oxidation states as a bookkeeping tool, how galvanic cells turn redox reactions into electricity, and how to compute cell potentials from standard values. Checkpoint: assign oxidation numbers to every atom in 6 compounds and calculate E°cell for 3 redox pairs.

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