Chemie-Rechner

Solutions, gases, pH and decay — chemistry homework and lab-prep math solved instantly in your browser.

Molaritäts-Rechner

Solute mass (g) Molar mass (g/mol) Solution volume (L)

Find the molar concentration of a solution from solute mass, molar mass and volume.

Verdünnungs-Rechner

Stock concentration C1 Target concentration C2 Final volume V2

Use C1V1 = C2V2 to find how much stock solution and diluent a dilution needs.

pH-Rechner

[H+] concentration (mol/L) or pH (leave [H+] blank)

Convert between hydrogen-ion concentration, pH and pOH in both directions.

Ideales-Gasgesetz-Rechner

Pressure P (atm) Volume V (L) — leave blank to solve Moles n Temperature T (K)

Solve PV = nRT for the missing variable using R = 0.082057 L·atm/mol·K.

Gramm-zu-Mol-Umrechner

Molar mass (g/mol) Mass (g) or Moles (leave mass blank)

Convert between grams and moles of any substance using its molar mass.

Kombiniertes-Gasgesetz-Rechner

Initial pressure P1 Initial volume V1 Initial temperature T1 (K) Final volume V2 (or leave blank) Final pressure P2 (or leave blank) Final temperature T2 (K)

Apply P1V1/T1 = P2V2/T2 to find the final pressure or volume of a gas.

Halbwertszeit-Rechner

Initial amount Half-life Elapsed time (same unit)

Find how much of a decaying substance remains after any elapsed time.

Lösungsprozent-Rechner

Solute mass (g) Solution volume (mL)

Express a solution strength as % w/v and grams per litre.