Molar mass

Molar Mass of Potassium Hydroxide

The molar mass of potassium hydroxide (KOH) is 56.105 g/mol.

Potassium Hydroxide at a glance

PropertyValue
Molar mass56.105 g/mol
Molecular weight56.105 u
Chemical formulaKOH
Monoisotopic mass55.9664461 u
CAS number1310-58-3
PubChem CID14797

How to calculate the molar mass of potassium hydroxide

1 × 39.098 + 1 × 15.999 + 1 × 1.008 = 56.105 g/mol

  1. Count the atoms in KOH: K 1, O 1, H 1.
  2. Multiply each atom count by the atomic weight of the element.
  3. Add the results to get 56.105 g/mol.

Elemental composition of potassium hydroxide

ElementAtomsAtomic weightMass (g/mol)Mass %
K Potassium139.09839.09869.687%
O Oxygen115.99915.99928.516%
H Hydrogen11.0081.0081.7966%

Grams and moles of potassium hydroxide

AmountEquals
1 g0.017824 mol
10 g0.17824 mol
100 g1.7824 mol
0.1 mol5.6105 g
1 mol56.105 g
1 g, in particles1.0734 × 10^22