Chemistry
Equation balancing, stoichiometry, molar mass, solutions and dilutions, pH, and the gas laws.
Chemistry rewards careful bookkeeping: conserve mass, track moles, account for the energy a reaction releases or absorbs, and the rest follows. This section handles the recurring work of a problem set or a bench session. On the mass-and-moles side it balances an equation, computes a molar mass, and carries a reaction through stoichiometry, dilutions, a titration to the equivalence point, pH, and the ideal gas law. On the thermochemistry side it applies q = mcΔT, sums step enthalpies by Hess’s law, and reads an activation energy off an Arrhenius plot. Each tool shows the relationship it applies and the units it expects, so a right answer is also a checkable one.
Moles and Formulas
Formula parsing, molar mass, and amount conversions for chemistry calculations.
Chemical Equation Balancer
Balance any chemical equation exactly, then assign oxidation states by the standard priority rules, with worked examples for peroxides, OF2, and Fe3O4.
Molar Mass Calculator
Convert moles to grams and grams to moles straight from a chemical formula. The molar mass is computed for you from sourced NIST/CIAAW atomic weights, with the particle count.
Stoichiometry Calculator
Balance any equation, then read the mole ratio of any two species as raw, simplest, and decimal, and find the limiting reactant, theoretical yield, and percent yield.
Molarity and Molality Calculator
Calculate molarity, molality, or density-based conversions with explicit solution and solvent denominators.
Ideal Gas Law and Boyle's Law Calculator
Solve PV = nRT and Boyle's law (P₁V₁ = P₂V₂) for any unknown. One shared unit per pair, worked steps, absolute pressure, and ideal-gas warnings.
Empirical Formula Calculator
Convert percent composition or masses into empirical and molecular formulas with a transparent mole-ratio table.
Titration Calculator: Solve for Molarity, Volume, or Moles
Solve an acid-base titration for an unknown molarity, volume, or moles at the equivalence point, with polyprotic acids and bases handled through an explicit acid-to-base mole ratio.
Thermochemistry and Reaction Energy
Track heat moved, the enthalpy change of a reaction, and the energy barrier its rate has to clear.
Activation Energy Calculator: Arrhenius Ea From Two Points or a Plot
Activation energy from two rate constants, one point, or an Arrhenius plot.
Hess's Law Calculator: Sum Steps or Formation Enthalpies
Reaction enthalpy by summing steps, or subtracting standard formation enthalpies.
Specific Heat Calculator: Solve for Any Variable
Solve q = mcΔT for heat, mass, specific heat, or temperature change.
More Chemistry instruments
Dilution Calculator
Solve C1V1 = C2V2 for stock concentration, stock volume, final concentration, or final volume.
pH Calculator: pH, pOH, and Buffers
Convert pH, pOH, hydronium, and hydroxide, solve buffer pH by Henderson-Hasselbalch, and get weak acid or base pH from Ka or Kb with the exact quadratic root and 5% rule check at 25 deg C.