Molar mass of potassium hydroxide (KOH)

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

caustic potash

Step-by-step calculation

Element	Atoms	Atomic mass	Subtotal
Potassium	× 1	39.098	= 39.098
Oxygen	× 1	15.999	= 15.999
Hydrogen	× 1	1.008	= 1.008
Total			56.105 g/mol

Percent composition by element

Potassium 69.69%
Oxygen 28.52%
Hydrogen 1.8%

Potassium hydroxide facts

Potassium hydroxide is a white, strongly basic solid usually sold as pellets or flakes.
It is used to make soft and liquid soaps, as the electrolyte in alkaline batteries, and to produce biodiesel.
It absorbs water from the air so readily that pellets left in an open container become wet and can eventually dissolve.

Try another formula

H₂O NaCl CO₂ C₆H₁₂O₆ H₂SO₄ Ca(OH)₂ CuSO₄·5H₂O C₈H₁₀N₄O₂

Could not read that formula

Related compounds

KAl(SO₄)₂·12H₂O Potassium alum KHC₈H₄O₄ Potassium hydrogen phthalate KHCO₃ Potassium bicarbonate KH₂PO₄ Monopotassium phosphate K₂HPO₄ Dipotassium phosphate CH₃COOK Potassium acetate

FAQ

What is the molar mass of KOH?

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

How do you calculate the molar mass of KOH?

Multiply the atomic mass of each element by the number of its atoms in KOH, then add the results: 1 × 39.098 (K) + 1 × 15.999 (O) + 1 × 1.008 (H) = 56.105 g/mol.

What percentage of KOH is Potassium?

Potassium makes up 69.69% of the mass of potassium hydroxide (KOH).