Chemistry Study Guide & Charts

Chemistry Study Guide is a compact general chemistry reference for quick revision: 46 topics in 13 sections, condensed into charts, tables, formula boxes and short key points.
From PV = nRT and pH = −log[H⁺] to ΔG = ΔH − TΔS and the Nernst equation, each chemistry formula is typeset cleanly, explained in plain language and works offline.

Instead of long lessons, every topic page gets straight to what you need to revise: the formulas with their symbols explained, a summary table or chart, a worked example where it helps, and practice questions with tap-to-reveal answers.

What you will revise

• Units and Stoichiometry: SI units and constants (CODATA 2022), mole and stoichiometry formulas, concentration units
• Atoms and the Periodic Table: light and quantum formulas, quantum numbers and electron configuration, periodic trends, magnetic properties
• Bonding and Structure: bond types, Lewis structures and formal charge, VSEPR shapes, hybridization and geometry, molecular orbital theory, intermolecular forces and solids
• Gases and Phases: gas laws, kinetic theory, Graham's law and real gases, phase changes, phase diagrams and the Clausius–Clapeyron equation
• Solutions: properties of solutions, Henry's law, Raoult's law, colligative properties, spectrophotometry and the Beer–Lambert law
• Thermodynamics: laws of thermodynamics and sign conventions, enthalpy and calorimetry, Hess's law, entropy and Gibbs energy
• Kinetics: rate laws and reaction order, integrated rate laws and half-life, activation energy, the Arrhenius equation and catalysts
• Equilibrium: equilibrium constants, ICE tables, Le Chatelier's principle, solubility product and the common ion effect
• Acids and Bases: acid–base definitions and strong acids, pH and buffer formulas, what makes an acid strong, titrations and indicators
• Inorganic Charts: solubility chart and precipitate colours, activity series of metals, flame tests and ion colours, metallurgy
• Redox and Electrochemistry: oxidation numbers and balancing redox equations, galvanic and electrolytic cells, standard potentials, the Nernst equation and Faraday's laws
• Nuclear Chemistry: radioactive decay and nuclear equations, half-life and carbon-14 dating, nuclear energy, fission and fusion
• Organic Chemistry: hydrocarbons and naming, functional groups, isomerism, CIP priority rules (R/S and E/Z), aromaticity, organic reaction types including SN1, SN2, E1 and E2

Features
• 46 chemistry topics in 13 sections
• 135 formula boxes and 103 summary tables
• 36 worked examples with real numbers
• 136 practice questions with tap-to-reveal answers
• 17 original diagrams: VSEPR shapes, an O₂ molecular orbital diagram, a phase diagram, the activity series, flame test colours, indicator ranges, a galvanic cell, an energy profile and more
• Tips, notes and warnings on easy-to-confuse points and sign conventions
• Search all topics from the home screen
• Dark mode
• Works offline, no account needed
• Available in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia

Who it is for
• High school students revising chemistry for tests and exams; useful when revising for AP, A-level or IB Chemistry
• College and university students in first-year general chemistry and introductory organic chemistry
• Teachers and tutors who want a reliable chemistry study guide with clear charts
• Anyone who needs to look up a chemistry formula, chart or rule quickly

Chemistry Study Guide is an independent study aid. Content is checked against the OpenStax Chemistry 2e and Organic Chemistry textbooks, IUPAC recommendations, NIST reference data and the CRC Handbook of Chemistry and Physics. It is not affiliated with any exam board, textbook publisher or standards body.

Recent changes:
Completely rewritten: 46 chemistry quick-reference sheets, from units, atoms and bonding to gases, solutions, thermodynamics, kinetics, equilibrium, acids and bases, electrochemistry, nuclear and organic chemistry, with charts, typeset formulas, drawings and practice questions. Old errors corrected. Now in 8 languages: English, Spanish, Portuguese, French, German, Arabic, Hindi and Indonesian.