Question #3f798

1 Answer
Mar 1, 2017

Aluminium chloride is usually assumed by chemists to be same as aluminium chloride anhydrous.

Explanation:

The definition of anhydrous is 'of a substance, especially a crystalline compound containing no water'. (Wikipedia 2017)

Aluminium chlorides (anhydrous) molar mass is 133.34 g/mol. It has no water attached to the ionic compound. Its chemical formula is usually shown as AlCl3.

However Aluminium chloride (hexahydrate) molar mass is 241.43 g/mol. This is because the Aluminium chloride absorbs water as it is hygroscopic (it absorbs water from the air), adding to its molar mass.
Its chemical formula is usually shown as AlCl3.6H2O.