Neutron STEM Lab

Chemistry Calculators & Interactive Learning Tools

Free chemistry calculators and learning tools for stoichiometry, solutions, acids and bases, equilibrium, thermochemistry, organic chemistry, and reference data.

Explore Chemistry

Use chemistry calculators and guided workbenches for quantitative problem solving, chemical relationships, equilibrium, thermochemistry, and molecular concepts.

Calculations are paired with assumptions, reference material, and educational explanations so students can inspect the model behind each result.

Common topics

  • stoichiometry
  • molarity and solutions
  • pH calculators
  • acid-base equilibrium
  • thermochemistry
  • organic chemistry
  • chemical reference data
  • reaction calculations

Chemistry tools

Open a calculator, simulator, visualizer, or reference workbench.

Acids, Bases & Equilibrium: Bases, and Equilibrium Learning Lab, showing labelled diagrams and key equations for acid base chemistry, pH, buffers, and titration.
Chemistryintermediate

Acids, Bases, and Equilibrium Learning Lab

Fourteen guided chemistry lessons that connect particles, reactions, equations, graphs, and worked reasoning for acids, bases, equilibrium, buffers, titrations, and solubility.

Open tool
Chemistry Reference: labelled diagrams and key equations for periodic table, chemistry reference, polyatomic ions, and solubility rules.
Chemistryintroductory

Chemistry Reference Center

Searchable periodic table and practical references for elements, ions, ionic formulas, solubility rules, acids and bases, activity series, VSEPR shapes, constants, and equations.

Open tool
General Chemistry: labelled diagrams and key equations for general chemistry, stoichiometry, molar mass, and gas laws.
Chemistryintroductory

General Chemistry Workbench

Sixteen calculators and visual models for atoms, formulas, reactions, gases, solutions, acids and bases, equilibrium, energy, kinetics, electronic structure, geometry, and nuclear decay.

Open tool
NASA Thermo Data: labelled diagrams and key equations for thermochemistry, NASA data, entropy, and Gibbs free energy.
Chemistryintermediate

NASA Glenn Thermochemical Data Explorer

Standard heat capacity, enthalpy, entropy, and Gibbs energy for 49 species from NASA’s published polynomial fits, with reaction properties and equilibrium constants across temperature.

Open tool
Organic Chemistry: labelled diagrams and key equations for organic chemistry, functional groups, IUPAC naming, and stereochemistry.
Chemistryintermediate

Organic Chemistry Workbench

Twelve guided modules for functional groups, nomenclature, molecular formulas, stereochemistry, conformations, acidity, mechanisms, reactions, spectroscopy, aromaticity, polymers, and chromatography.

Open tool
Thermochemistry: labelled diagrams and key equations for thermochemistry, calorimetry, enthalpy, and Hess law.
Chemistryintermediate

Thermochemistry Workbench

Guided thermochemistry lessons for calorimetry, formation enthalpy, Hess’s law, bond energies, heating curves, entropy, Gibbs energy, catalysts, fuels, and temperature corrections.

Open tool