Molar Mass of Na2SO4·10H2O (Sodium Sulfate Decahydrate)
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What is the molar mass of Na2SO4·10H2O?
Answer
M(Na2SO4·10H2O) ≈
322.19 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — S: 32.06.
10 H2O — water of crystallization, part of the molar mass: 10 × 18.015 = 180.150.
Na2SO4·10H2O = Na2SO4 + 10 H2O → Na 2, S 1, O 14, H 20
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Nasodium | 2 | 22.990 | 45.980 w ≈ 14.27% | ≈ 14.27% |
| Ssulfur | 1 | 32.06 | 32.06 w ≈ 9.95% | ≈ 9.95% |
| Ooxygen | 14 | 15.999 | 223.986 w ≈ 69.52% | ≈ 69.52% |
| Hhydrogen | 20 | 1.0080 | 20.1600 w ≈ 6.26% | ≈ 6.26% |
| Σ = 322.186 ≈ 322.19 g/mol w = 100% | 100% | |||
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
O 69.52%
Na 14.27%S 9.95%H 6.26%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| C₂₀H₁₄O₄ (phenolphthalein) | 318.328 |
| ZnI₂ (zinc iodide) | 319.18 |
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| Na₂SO₄·10H₂O (sodium sulfate decahydrate) | 322.19 |
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