Molar mass of sodium hydroxide (NaOH)

The molar mass of sodium hydroxide (NaOH) is 39.997 g/mol.

lye · caustic soda

Step-by-step calculation

Element	Atoms	Atomic mass	Subtotal
Sodium	× 1	22.99	= 22.99
Oxygen	× 1	15.999	= 15.999
Hydrogen	× 1	1.008	= 1.008
Total			39.997 g/mol

Percent composition by element

Sodium 57.48%
Oxygen 40%
Hydrogen 2.52%

Sodium hydroxide facts

Sodium hydroxide is a white, waxy solid usually sold as pellets or flakes, and it is a strong base that dissolves readily in water.
It is used to make soap, paper, and aluminum, to clear clogged drains, and to give pretzels their dark, glossy crust.
Dissolving sodium hydroxide in water releases a lot of heat, and the solid slowly absorbs moisture and carbon dioxide when left open to air.

Try another formula

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

Could not read that formula

Related compounds

NaHCO₃ Sodium bicarbonate CH₃COONa Sodium acetate Na₂B₄O₇·10H₂O Borax Na₂CO₃·10H₂O Sodium carbonate decahydrate NaHSO₄ Sodium bisulfate Na₂S₂O₃·5H₂O Sodium thiosulfate pentahydrate

FAQ

What is the molar mass of NaOH?

The molar mass of sodium hydroxide (NaOH) is 39.997 g/mol.

How do you calculate the molar mass of NaOH?

Multiply the atomic mass of each element by the number of its atoms in NaOH, then add the results: 1 × 22.99 (Na) + 1 × 15.999 (O) + 1 × 1.008 (H) = 39.997 g/mol.

What percentage of NaOH is Sodium?

Sodium makes up 57.48% of the mass of sodium hydroxide (NaOH).