What is the formula of the Cocl2 Hydrate?

The formula for the hydrated compound Cobalt (II) chloride hexahydrate is CoCl2 ·6H2O. This means that for every formula unit of CoCl2, there are 6 molecules of water present in the solution. This compound is also known as cobaltous chloride hexahydrate.

Cobalt(II) chloride hexahydrate is commonly obtained from chemical supply houses with the formula CoCl2 ·6H2O. An analysis of 25.0 g of this hydrate showed that it contained 11.3 g of water. This means that the percent composition of the hydrate is 45.2% water.

The hydrate can be written using the chemical symbols of the elements as follows: CoCl2 ·6H2O. This is called the empirical formula of the compound because it only shows the simplest ratio in which the atoms are present.

If the elements are represented in their molar ratios, then the formula can be written as CoCl2 ·2H2O. This is the molecular formula of the hydrate, because it shows the actual number of atoms of each element in the compound.

In conclusion, the formula of the Cocl2 hydrate is CoCl2 ·6H2O, which is the empirical formula, and CoCl2 ·2H2O, which is the molecular formula. The percent composition of the hydrate is 45.2% water.