Molar Mass of Potassium sulfate
K2SO4 — 174.252 g/mol, worked out element by element.
Molar mass of Potassium sulfate, K₂SO₄
174.252 g/mol
Molecular weight 174.252 · 7 atoms per formula unit
Also known as: k2so4, potassium sulphate.
A chloride-free potassium fertiliser, used where chloride would damage the crop.
How 174.252 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Potassium | 2 | 39.098 | 78.196 | 44.88% |
| Oxygen | 4 | 15.999 | 63.996 | 36.73% |
| Sulfur | 1 | 32.06 | 32.060 | 18.40% |
| Total | 7 | 174.252 | 100% |
M = 2 × 39.098 + 4 × 15.999 + 1 × 32.060 = 174.252 g/mol
Grams to moles for Potassium sulfate
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0057 mol | 3.456 × 10^21 |
| 10 g | 0.0574 mol | 3.456 × 10^22 |
| 25 g | 0.1435 mol | 8.640 × 10^22 |
| 50 g | 0.2869 mol | 1.728 × 10^23 |
| 100 g | 0.5739 mol | 3.456 × 10^23 |
| 250 g | 1.4347 mol | 8.640 × 10^23 |
| 174.252 g | 1 mol | 6.022 × 10^23 |
For any other amount, use the molar mass calculator, or the molarity calculator to make up a solution of a given concentration.
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Frequently Asked Questions
What is the molar mass of Potassium sulfate?
The molar mass of Potassium sulfate (K2SO4) is 174.252 g/mol. That is the sum of the standard atomic weights of all 7 atoms in one formula unit: 2 × 39.098 + 4 × 15.999 + 1 × 32.060 = 174.252.
What is the molecular weight of Potassium sulfate?
174.252 — the same number as the molar mass, but as a dimensionless ratio rather than in g/mol. The two terms describe the same arithmetic, so a molecular weight of 174.25 and a molar mass of 174.25 g/mol are the same answer.
How many moles are in 100 g of Potassium sulfate?
100 ÷ 174.252 = 0.5739 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Potassium sulfate?
By mass, Potassium sulfate is 44.88% potassium, 36.73% oxygen, 18.40% sulfur. Each element's share is its total mass in the formula divided by 174.252.
How many atoms are in one formula unit of Potassium sulfate?
7: 2 potassium, 4 oxygen, 1 sulfur. One mole contains 6.02214076 × 10²³ formula units, so a mole of Potassium sulfate contains 7 × 6.022 × 10²³ atoms in total.