Molar Mass of K2SO4 (Potassium Sulfate)

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Chemical formula Write symbols with a capital letter: CoCl2 is cobalt chloride, COCl2 is phosgene. A hydrate takes a dot: CuSO4·5H2O or CuSO4.5H2O

What is the molar mass of K2SO4?

Answer

M(K2SO4) ≈
174.25 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.

Contribution of each element
Element Atoms, n Atomic weight, A n × A, g/mol Mass fraction, w
Kpotassium239.09878.196 w ≈ 44.88%
Ssulfur132.0632.06 w ≈ 18.40%
Ooxygen415.99963.996 w ≈ 36.73%
Σ = 174.252 ≈ 174.25 g/mol w = 100%

Each fraction is rounded on its own, so the printed ones add up to 100.01%; unrounded, they make exactly 100%.

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

S 18.40%

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Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
C₆H₇NO₃S (sulfanilic acid)173.19
K₂HPO₄ (dibasic potassium phosphate)174.174
C₆H₁₄N₄O₂ (L-arginine)174.204
K₂SO₄ (potassium sulfate)174.25
Lu (lutetium)174.97
BaF₂ (barium fluoride)175.33
HC₆H₇O₆ (vitamin C)176.124

FAQ

What is the molar mass of K2SO4?

M(K₂SO₄) ≈ 174.25 g/mol

How to calculate the molar mass of K₂SO₄?

Add up the atomic weights of all the atoms in the formula: 2 × 39.098 + 32.06 + 4 × 15.999 = 174.252 ≈ 174.25 g/mol.

How many grams are in 2 moles of K₂SO₄?

m = n × M = 2 mol × 174.25 g/mol = 348.50 g.

See Also