Reaction of PCl3 with water

When PCl3 reacts with water, it forms different products depending on the reaction conditions.

PCl3 + H2O → H3PO3 + 3HCl

The above reaction occurs when PCl3 is added to water in a 1:3 molar ratio. The reaction is spontaneous and exothermic.

Explanation

The reaction between PCl3 and water is an example of a hydrolysis reaction. Hydrolysis is a chemical reaction in which water is used to break down a compound. In this case, PCl3 is the compound that is hydrolyzed.

When PCl3 is added to water, it reacts with water molecules to form H3PO3 and HCl. The reaction is as follows:

PCl3 + H2O → H3PO3 + 3HCl

The product H3PO3 is called phosphorous acid. It is a weak acid that is used in the preparation of other phosphorous compounds. The acid has a structure similar to that of orthophosphoric acid (H3PO4), but it contains one less oxygen atom. The acid is a white solid that is soluble in water.

The other product of the reaction is HCl, which is a strong acid. The acid is formed as a result of the hydrolysis of PCl3. The acid is a gas that is soluble in water.

Conclusion

In conclusion, the reaction between PCl3 and water results in the formation of H3PO3 and HCl. The reaction is an example of a hydrolysis reaction.