化学计算器

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

摩尔浓度计算器

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

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

稀释计算器

Stock concentration C1 Target concentration C2 Final volume V2

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

pH计算器

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

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

理想气体定律计算器

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.

克摩尔换算器

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

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

联合气体定律计算器

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.

半衰期计算器

Initial amount Half-life Elapsed time (same unit)

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

溶液百分比计算器

Solute mass (g) Solution volume (mL)

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