The molecular weight of Aluminium chloride hexahydrate [AlCl_{3}.6H_{2}O] is 241.4320384.

Aluminium chloride [AlCl_{3}] is an inorganic compound of two elements: Aluminium and Chlorine. The hexahydrate form of Aluminium chloride [AlCl_{3}.6H_{2}O] also contains 6 water molecules. The molecular weight of Aluminium chloride hexahydrate is 241.4320384 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements and water molecules.

**CALCULATION PROCEDURE: Aluminium Chloride Hexahydrate [AlCl**_{3}.6H_{2}O] Molecular Weight Calculation

_{3}.6H

_{2}O] Molecular Weight Calculation

**Step 1: Find out the chemical formula and determine constituent atoms and their number in an Aluminium chloride hexahydrate molecule. **From the chemical formula, you will know different atoms and their number in an Aluminium chloride hexahydrate molecule. The chemical formula of Aluminium chloride hexahydrate is AlCl

_{3}.6H

_{2}O. From the chemical formula, you can find that one molecule of Aluminium chloride hexahydrate consists of one Aluminium (Al) atom, three Chlorine (Cl) atoms, and six water molecules.

**Step 2: Find out the atomic weights of each atom (from the periodic table). **

Atomic weight of Aluminium (Al): 26.9815384 (Ref: ciaaw-aluminium)

Atomic weight of Chlorine (Cl): 35.4527 (Ref: Jlab-ele017)

Molecular weight of Water [H2O]: 18.0154

**Step 3: Calculate the molecular weight of Aluminium chloride hexahydrate by adding the total weight of all atoms. **

Number of Aluminium (Al) atoms in Aluminium chloride hexahydrate: 1

Atomic weight of Aluminium: 26.9815384

Total weight of Aluminium atoms in Aluminium chloride hexahydrate: 26.9815384 x 1 = 26.9815384

Number of Chlorine (Cl) atoms in Aluminium chloride hexahydrate: 3

Atomic weight of Chlorine: 35.4527

Total weight of Chlorine atoms in Aluminium chloride hexahydrate: 35.4527 x 3 = 106.3581

Number of water (H_{2}O) molecules in Aluminium chloride hexahydrate: 6

Molecular weight of water: 18.0154

Total weight of water in Aluminium chloride hexahydrate: 18.0154 x 6 = 108.0924

**Step 4: Calculate the molecular weight of Aluminium chloride hexahydrate by adding up the total weight of all atoms. **

Molecular weight of Aluminium chloride hexahydrate: 26.9815384 (Aluminium) + 106.3581 (Chlorine) + 108.0924 (Water) = 241.4320384

So the molecular weight of Aluminium chloride hexahydrate is 241.4320384.

**Aluminium Chloride Hexahydrate [AlCl _{3}.6H_{2}O] Molecular Weight Calculation**

Molecular weight of Aluminium Chloride Hexahydrate [AlCl_{3}.6H_{2}O] | |||

Constituent atoms/Molecules | Number of each atom | Atomic weight | Total weight |

Aluminium (Al) | 1 | 26.9815384 | 26.9815384 |

Chlorine (Cl) | 3 | 35.4527 | 106.3581 |

Water (H2O) | 6 | 18.0154 | 108.0924 |

Molecular weight of Aluminium Chloride Hexahydrate [AlCl_{3}.6H_{2}O]: | 241.4320384 |

## REFERENCES:

- Ciaaw-aluminium: https://www.ciaaw.org/aluminium.htm
- Jlab-ele017: https://education.jlab.org/itselemental/ele017.html

# See also:

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