Learning Resources

Chemistry beyond Chem Help: selected educational resources from trusted creators and institutions.

Chemistry topic
Course level
Resource type
Estimated time

32 resources

Reading

Acid–Base Titrations

OpenStax / Rice University

Interpret titration curves, calculate pH at selected stages, and understand indicator selection.

Acids & bases· Honors / AP

~55 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/14-7-acid-base-titrations
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Alcohols and Ethers

OpenStax / Rice University

Introduce oxygen-containing functional groups through alcohols and ethers, connecting molecular structures with names and properties. Enrichment beyond AP-required coverage.

Organic chemistry· Foundations / Honors

~30 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/20-2-alcohols-and-ethers
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Atomic Structure and Symbolism

OpenStax / Rice University

Connect subatomic particles with isotope notation, ionic charge, and average atomic mass.

Atoms & periodic trends· Foundations / Honors / AP

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/2-3-atomic-structure-and-symbolism
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reference Sheet

Atomic Structure Equation Sheet — MIT 5.111 Exam 1

MIT OpenCourseWare

A compact atomic-structure reference combining a periodic table with physical constants and equations for photons, particle motion, matter waves, and atomic energy levels. Not an authorized AP exam handout.

Atoms & periodic trends· Honors / AP

~10 min · Chem Help estimate

https://ocw.mit.edu/courses/5-111sc-principles-of-chemical-science-fall-2014/resources/mit5_111f14_exam1equsheet/
Source & terms checked · 2026-10-20

Outbound link to the official reference page only; no PDF or equations are reproduced here. MIT OCW states CC BY-NC-SA 4.0 with attribution, license link, change disclosure, noncommercial use, and ShareAlike for adaptations. MIT names and logos must not imply endorsement.

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Video

Balancing chemical equations

Khan Academy

Review how coefficients make the number of each type of atom agree on both sides of a reaction.

Moles & stoichiometry· Foundations / Honors / AP

~5 min · Chem Help estimate

https://www.khanacademy.org/science/hs-chemistry-tx/x1ff71253c4e4a747%3Achemical-reactions/x1ff71253c4e4a747%3Abalancing-chemical-equations/v/balancing-chemical-equations-introduction
Source & terms checked · 2026-10-20

External link only; video runtime is unverified. Khan Academy policy permits links and makes embedding conditional on its noncommercial and attribution rules. Note: All Khan Academy content is available for free at www.khanacademy.org. No affiliation or endorsement. Monetization or ads require renewed rights review.

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Interactive Simulation

Balancing Chemical Equations

PhET Interactive Simulations / University of Colorado Boulder

Connect balanced equations with conserved atoms rather than memorized coefficient rules.

Moles & stoichiometry· Foundations / Honors

~20 min · Chem Help estimate

https://phet.colorado.edu/en/simulations/balancing-chemical-equations
Source & terms checked · 2026-10-20

Link to the original simulation only. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY-NC 4.0 (https://phet.colorado.edu). Current regular HTML5 simulation terms distinguish noncommercial use from commercial licensing. No simulation is embedded, modified, or rehosted here.

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Interactive Simulation

Build an Atom

PhET Interactive Simulations / University of Colorado Boulder

Explore how changing subatomic particles changes an atom’s identity and charge.

Atoms & periodic trends· Foundations

~20 min · Chem Help estimate

https://phet.colorado.edu/en/simulations/build-an-atom
Source & terms checked · 2026-10-20

Link to the original simulation only. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY-NC 4.0 (https://phet.colorado.edu). Current regular HTML5 simulation terms distinguish noncommercial use from commercial licensing. No simulation is embedded, modified, or rehosted here.

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Reading

Calorimetry

OpenStax / Rice University

Connect measured temperature changes with heat transfer, distinguishing the reacting system from its surroundings.

Thermochemistry· Foundations / Honors / AP

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/5-2-calorimetry
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Collision Theory

OpenStax / Rice University

Explain successful collisions, activation energy, and the temperature dependence of reaction rates.

Reaction kinetics· Honors / AP

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/12-5-collision-theory
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Electrode and Cell Potentials

OpenStax / Rice University

Relate electrode potentials to cell voltage and the tendency of redox reactions to proceed.

Electrochemistry· Honors / AP

~45 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/17-3-electrode-and-cell-potentials
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Enthalpy

OpenStax / Rice University

Relate energy accounting to constant-pressure reaction heat, then use thermochemical equations and Hess’s law to determine enthalpy changes.

Thermochemistry· Honors / AP

~55 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/5-3-enthalpy
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Equilibrium Constants

OpenStax / Rice University

Construct reaction quotients and equilibrium expressions from balanced equations and interpret their numerical values.

Equilibrium & solubility· Honors / AP

~45 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/13-2-equilibrium-constants
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Evolution of Atomic Theory

OpenStax / Rice University

Trace the experimental evidence that established subatomic particles and reshaped models of atomic structure.

Atoms & periodic trends· Foundations / Honors / AP

~30 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/2-2-evolution-of-atomic-theory
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Galvanic Cells

OpenStax / Rice University

Trace oxidation and reduction through cell components and represent cells using cell notation.

Electrochemistry· Honors / AP

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/17-2-galvanic-cells
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Hydrocarbons

OpenStax / Rice University

Compare carbon-chain structures, bond types, naming patterns, isomers, and characteristic hydrocarbon reactions. Enrichment beyond AP-required coverage.

Organic chemistry· Honors

~55 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/20-1-hydrocarbons
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Video

Lecture 11: Lewis Structures

MIT OpenCourseWare — Catherine Drennan & Elizabeth Vogel Taylor

Strengthen electron-counting and molecular representation through an introductory university lecture.

Bonding & molecular geometry· Honors / AP

~50 min · Chem Help estimate

https://ocw.mit.edu/courses/5-111-principles-of-chemical-science-fall-2008/resources/lecture-11/
Source & terms checked · 2026-10-20

Original lecture link only; no video, transcript, or lecture material is copied or embedded. MIT OCW terms identify CC BY-NC-SA 4.0 with attribution, noncommercial, and ShareAlike conditions; MIT names and logos must not imply endorsement.

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Video

Lecture 9: Periodic Trends

MIT OpenCourseWare — Catherine Drennan & Elizabeth Vogel Taylor

Develop a deeper explanation of recurring patterns in elemental properties through an introductory university lecture.

Atoms & periodic trends· Honors / AP

~50 min · Chem Help estimate

https://ocw.mit.edu/courses/5-111-principles-of-chemical-science-fall-2008/resources/lecture-9/
Source & terms checked · 2026-10-20

Original lecture link only; no video, transcript, or lecture material is copied or embedded. MIT OCW terms identify CC BY-NC-SA 4.0 with attribution, noncommercial, and ShareAlike conditions; MIT names and logos must not imply endorsement.

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Reading

Lewis Symbols and Structures

OpenStax / Rice University

Represent valence electrons with dot symbols and build Lewis structures showing bonding in molecules and ions.

Bonding & molecular geometry· Foundations / Honors / AP

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/7-3-lewis-symbols-and-structures
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Molecular Structure and Polarity

OpenStax / Rice University

Infer molecular geometry from electron domains, then connect shape and bond polarity to molecular polarity.

Bonding & molecular geometry· Honors / AP

~55 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/7-6-molecular-structure-and-polarity
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Interactive Simulation

Molecule Shapes

PhET Interactive Simulations / University of Colorado Boulder

Investigate how bonding groups and lone pairs determine molecular shape and bond angles.

Bonding & molecular geometry· Honors / AP

~25 min · Chem Help estimate

https://phet.colorado.edu/en/simulations/molecule-shapes
Source & terms checked · 2026-10-20

Link to the original simulation only. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY-NC 4.0 (https://phet.colorado.edu). Current regular HTML5 simulation terms distinguish noncommercial use from commercial licensing. No simulation is embedded, modified, or rehosted here.

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Practice

Molecules Matter — Teacher-Guided Activity

American Chemical Society

Use observations and particle drawings to explain matter at the molecular scale. This activity is designed for teacher guidance.

Atoms & periodic trends· Foundations

~40 min · Chem Help estimate

https://www.acs.org/middleschoolchemistry/lessonplans/chapter1/lesson1.html
Source & terms checked · 2026-10-20

Original lesson link only; activity sheets and answers are not reproduced. ACS grants specific classroom and noncommercial teacher-workshop permissions, not a blanket Creative Commons license. Commercial incorporation in web or print media requires written consent. General terms: https://www.acs.org/terms.html.

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Reading

Nuclear Structure and Stability

OpenStax / Rice University

Connect nuclear composition with stability trends and examine how mass defect relates to nuclear binding energy. Enrichment beyond AP-required coverage.

Nuclear chemistry· Honors

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/21-1-nuclear-structure-and-stability
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reference Sheet

Periodic Table of the Elements

NIST

A printable periodic-table reference for looking up critically evaluated atomic properties beside chemistry calculations and element-comparison exercises.

Atoms & periodic trends· Foundations / Honors / AP

~5 min · Chem Help estimate

https://www.nist.gov/pml/periodic-table-elements
Source & terms checked · 2026-10-20

Outbound link only; no table or PDF is reproduced. NIST allows copying and distributing website information except material marked copyrighted and requests appropriate credit; this is not blanket public-domain clearance. The resource is Special Publication 966, updated June 2024, reclassified from SRD 145 as an information compilation. Resource disclaimer: https://www.nist.gov/pml/database-disclaimer.

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Reading

pH and pOH

OpenStax / Rice University

Translate between ion concentrations, pH, and pOH and classify aqueous solutions.

Acids & bases· Honors / AP

~30 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/14-2-ph-and-poh
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

Provider terms
Reading

Radioactive Decay

OpenStax / Rice University

Identify decay pathways, balance nuclear changes, and use half-life relationships to interpret decay and radiometric dating.

Nuclear chemistry· Honors

~50 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/21-3-radioactive-decay
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

Provider terms
Reading

Rate Laws

OpenStax / Rice University

Determine reaction orders from experimental data and calculate rates using rate laws.

Reaction kinetics· Honors / AP

~45 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/12-3-rate-laws
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

Provider terms
Reading

Reaction Stoichiometry

OpenStax / Rice University

Use balanced equations to relate reactant and product quantities through moles, mass, and molarity.

Moles & stoichiometry· Foundations / Honors / AP

~45 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/4-3-reaction-stoichiometry
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Reaction Yields

OpenStax / Rice University

Identify the limiting reagent and calculate theoretical and percentage yields.

Moles & stoichiometry· Honors / AP

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/4-4-reaction-yields
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

Shifting Equilibria: Le Châtelier’s Principle

OpenStax / Rice University

Predict how equilibrium systems respond to changes in concentration and temperature.

Equilibrium & solubility· Honors / AP

~40 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/13-3-shifting-equilibria-le-chateliers-principle
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

The Ideal Gas Law

OpenStax / Rice University

Develop gas-variable relationships and apply the ideal gas equation to numerical problems.

Gases & solutions· Honors / AP

~55 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/9-2-relating-pressure-volume-amount-and-temperature-the-ideal-gas-law
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Reading

The Kinetic-Molecular Theory

OpenStax / Rice University

Explain gas-law relationships using particle motion, collisions, and the connection between temperature and average kinetic energy.

Gases & solutions· Foundations / Honors / AP

~25 min · Chem Help estimate

https://openstax.org/books/chemistry-2e/pages/9-5-the-kinetic-molecular-theory
Source & terms checked · 2026-10-20

Outbound link only; no textbook content is reproduced or embedded. The current Chemistry 2e preface lists CC BY-NC-SA 4.0, permits direct links to web-view sections, and distinguishes commercial reuse permissions. The license does not grant blanket commercial reuse rights.

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Practice

What Is a Chemical Reaction? — Teacher-Guided Activity

American Chemical Society

Trace atoms through combustion reactions and check whether equations conserve each element. This activity is designed for teacher guidance.

Moles & stoichiometry· Foundations / Honors

~45 min · Chem Help estimate

https://www.acs.org/middleschoolchemistry/lessonplans/chapter6/lesson1.html
Source & terms checked · 2026-10-20

Original lesson link only; activity sheets and answers are not reproduced. ACS grants specific classroom and noncommercial teacher-workshop permissions, not a blanket Creative Commons license. Commercial incorporation in web or print media requires written consent. General terms: https://www.acs.org/terms.html.

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