Molar mass of magnesium chloride (MgCl2)

The molar mass of magnesium chloride (MgCl2) is 95.205 g/mol.

Step-by-step calculation

ElementAtomsAtomic massSubtotal
Magnesium × 1 24.305 = 24.305
Chlorine × 2 35.45 = 70.9
Total95.205 g/mol

Percent composition by element

  • Magnesium 25.53%
  • Chlorine 74.47%

Magnesium chloride facts

  • Magnesium chloride is a white or colorless crystalline salt that readily absorbs water from the air.
  • It is used to de-ice roads, to control dust on gravel roads, and to curdle soy milk into tofu, where it is known as nigari.
  • Seawater and natural brines are rich in magnesium chloride, and electrolysis of the molten salt produces magnesium metal and chlorine gas.

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H2O NaCl CO2 C6H12O6 H2SO4 Ca(OH)2 CuSO4·5H2O C8H10N4O2

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Related compounds

MgCl2·6H2O Magnesium chloride hexahydrate NaCl Sodium chloride KCl Potassium chloride HCl Hydrochloric acid KClO3 Potassium chlorate AgCl Silver chloride

FAQ

What is the molar mass of MgCl2?

The molar mass of magnesium chloride (MgCl2) is 95.205 g/mol.

How do you calculate the molar mass of MgCl2?

Multiply the atomic mass of each element by the number of its atoms in MgCl2, then add the results: 1 × 24.305 (Mg) + 2 × 35.45 (Cl) = 95.205 g/mol.

What percentage of MgCl2 is Chlorine?

Chlorine makes up 74.47% of the mass of magnesium chloride (MgCl2).