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Molar massPotassium permanganate
Molar mass of KMnO4 (Potassium permanganate)
The molar mass of KMnO4 is 158.03 g/mol.
A deep purple oxidising agent used in redox titrations.
Step-by-step calculation
Add up the atomic masses of every atom in the formula:
1 × 39.098 + 1 × 54.938 + 4 × 15.999 = 158.03 g/mol
| Element | Atoms | Atomic mass (u) | Subtotal (g/mol) | % by mass |
|---|---|---|---|---|
| Potassium (K) | 1 | 39.098 | 39.098 | 24.74% |
| Manganese (Mn) | 1 | 54.938 | 54.938 | 34.76% |
| Oxygen (O) | 4 | 15.999 | 63.996 | 40.50% |
| Molar mass of KMnO4 | 158.03 g/mol | |||
Moles to grams for KMnO4
Multiply the number of moles by 158.03 g/mol to get the mass, and divide a mass by 158.03 g/mol to get the moles.
| Amount (mol) | Mass (g) | Mass (g) | Amount (mol) |
|---|---|---|---|
| 0.1 mol | 15.80 g | 1 g | 0.0063 mol |
| 0.25 mol | 39.51 g | 5 g | 0.0316 mol |
| 0.5 mol | 79.02 g | 10 g | 0.0633 mol |
| 1 mol | 158.03 g | 50 g | 0.3164 mol |
| 2 mol | 316.06 g | 100 g | 0.6328 mol |
| 5 mol | 790.16 g | 500 g | 3.1639 mol |
Experiments that use potassium permanganate
⚖️ Calculate any other formulaFrequently asked questions
What is the molar mass of KMnO4?
The molar mass of KMnO₄ (potassium permanganate) is 158.03 g/mol, so one mole of potassium permanganate weighs 158.03 grams.
How do you calculate the molar mass of KMnO4?
Multiply each element’s atomic mass by the number of atoms in the formula and add the results: 1 × 39.098 + 1 × 54.938 + 4 × 15.999 = 158.03 g/mol.
What percentage of KMnO4 is oxygen?
Oxygen makes up 40.50% of the mass of KMnO₄.
How many grams are in one mole of KMnO4?
One mole of KMnO₄ has a mass of 158.03 grams, and contains 6.022 × 10²³ formula units.