Calculators for chemical reactions, thermodynamics, electrochemistry, and more
Calculate pressure or volume changes using Boyle's Law: P₁V₁ = P₂V₂ (constant temperature).
Calculate volume or temperature changes using Charles's Law: V₁/T₁ = V₂/T₂ (constant pressure, temperature in Kelvin).
Calculate concentration or volume changes using the dilution formula: C₁V₁ = C₂V₂.
Calculate the empirical formula of a compound from mass percentages of its constituent elements.
Calculate the remaining amount of a substance after a given time using the half-life decay formula: N = N₀(½)^(t/t½).
Calculate pressure, volume, moles, or temperature using the ideal gas law (PV = nRT).
Calculate the molar mass of a compound from its elemental composition.
Calculate pH, pOH, hydrogen ion concentration [H⁺], or hydroxide ion concentration [OH⁻] using the formulas pH = -log[H⁺], pOH = -log[OH⁻], and pH + pOH = 14.
Calculate molarity, moles, or volume of a solution using the formula M = mol/L.
Convert between mass and moles using molar mass, and calculate the number of molecules.
Calculate the weighted average atomic mass from isotope masses and abundances.
Calculate boiling point elevation using ΔTb = i × Kb × m.
Determine mass of carbon, hydrogen, and oxygen in a sample from CO₂ and H₂O combustion products.
Calculate the equilibrium constant K from equilibrium concentrations: K = [C]^c[D]^d / [A]^a[B]^b.
Calculate freezing point depression using ΔTf = i × Kf × m.
Calculate molarity from moles of solute and volume of solution: M = mol / L.
Look up oxidation numbers for elements in common compounds and polyatomic ions.
Calculate percent yield from actual and theoretical yields in chemical reactions.
Calculate the rate constant k using the Arrhenius equation: k = Ae^(-Ea/RT).
Calculate the reaction quotient Q = [C]^c[D]^d / [A]^a[B]^b for chemical reactions.