Molar Mass of CuSO4·5H2O (Copper(II) Sulfate Pentahydrate)
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What is the molar mass of CuSO4·5H2O?
Answer
M(CuSO4·5H2O) ≈
249.68 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.
5 H2O — water of crystallization, part of the molar mass: 5 × 18.015 = 90.075.
CuSO4·5H2O = CuSO4 + 5 H2O → Cu 1, S 1, O 9, H 10
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Cucopper | 1 | 63.546 | 63.546 w ≈ 25.45% | ≈ 25.45% |
| Ssulfur | 1 | 32.06 | 32.06 w ≈ 12.84% | ≈ 12.84% |
| Ooxygen | 9 | 15.999 | 143.991 w ≈ 57.67% | ≈ 57.67% |
| Hhydrogen | 10 | 1.0080 | 10.0800 w ≈ 4.04% | ≈ 4.04% |
| Σ = 249.677 ≈ 249.68 g/mol w = 100% | 100% | |||
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
O 57.67%
Cu 25.45%S 12.84%H 4.04%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| C₁₀H₁₆N₂O₃S (biotin) | 244.31 |
| MgSO₄·7H₂O (magnesium sulfate heptahydrate) | 246.47 |
| Ag₂S (silver sulfide) | 247.80 |
| CuSO₄·5H₂O (copper(II) sulfate pentahydrate) | 249.68 |
| (NH₄)₂Cr₂O₇ (ammonium dichromate) | 252.063 |
| BaCrO₄ (barium chromate) | 253.32 |
| I₂ (iodine) | 253.80 |