Molar mass of sodium thiosulfate pentahydrate (Na2S2O3·5H2O)

The molar mass of sodium thiosulfate pentahydrate (Na2S2O3·5H2O) is 248.172 g/mol.

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Step-by-step calculation

Element	Atoms	Atomic mass	Subtotal
Sodium	× 2	22.99	= 45.98
Sulfur	× 2	32.06	= 64.12
Oxygen	× 8	15.999	= 127.992
Hydrogen	× 10	1.008	= 10.08
Total			248.172 g/mol

Percent composition by element

Sodium 18.53%
Sulfur 25.84%
Oxygen 51.57%
Hydrogen 4.06%

Try another formula

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

Could not read that formula

Related compounds

NaHSO₄ Sodium bisulfate Na₂SO₄·10H₂O Sodium sulfate decahydrate C₁₂H₂₅NaO₄S Sodium dodecyl sulfate C₁₄H₁₄N₃NaO₃S Methyl orange NaOH Sodium hydroxide H₂SO₄ Sulfuric acid

FAQ

What is the molar mass of Na2S2O3·5H2O?

The molar mass of sodium thiosulfate pentahydrate (Na2S2O3·5H2O) is 248.172 g/mol.

How do you calculate the molar mass of Na2S2O3·5H2O?

Multiply the atomic mass of each element by the number of its atoms in Na2S2O3·5H2O, then add the results: 2 × 22.99 (Na) + 2 × 32.06 (S) + 8 × 15.999 (O) + 10 × 1.008 (H) = 248.172 g/mol.

What percentage of Na2S2O3·5H2O is Oxygen?

Oxygen makes up 51.57% of the mass of sodium thiosulfate pentahydrate (Na2S2O3·5H2O).