Molar mass of iron(III) chloride hexahydrate (FeCl3·6H2O)

The molar mass of iron(III) chloride hexahydrate (FeCl3·6H2O) is 270.285 g/mol.

ferric chloride hexahydrate

Step-by-step calculation

ElementAtomsAtomic massSubtotal
Iron × 1 55.845 = 55.845
Chlorine × 3 35.45 = 106.35
Hydrogen × 12 1.008 = 12.096
Oxygen × 6 15.999 = 95.994
Total270.285 g/mol

Percent composition by element

  • Iron 20.66%
  • Chlorine 39.35%
  • Hydrogen 4.48%
  • Oxygen 35.52%

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FAQ

What is the molar mass of FeCl3·6H2O?

The molar mass of iron(III) chloride hexahydrate (FeCl3·6H2O) is 270.285 g/mol.

How do you calculate the molar mass of FeCl3·6H2O?

Multiply the atomic mass of each element by the number of its atoms in FeCl3·6H2O, then add the results: 1 × 55.845 (Fe) + 3 × 35.45 (Cl) + 12 × 1.008 (H) + 6 × 15.999 (O) = 270.285 g/mol.

What percentage of FeCl3·6H2O is Chlorine?

Chlorine makes up 39.35% of the mass of iron(III) chloride hexahydrate (FeCl3·6H2O).