When liquid phosphorus trichloride is added to water, it reacts to form aqueous phosphorous acid, h3po3 (aq), and aqueous hydrochloric acid?

Liquid phos phorus trichloride, PCl3, reacts exothermically with water, H2O, in a very fast reaction. The reaction then forms aqueous phosphorous acid, H3PO3 (aq) and aqueous hydrochloric acid, HCl (aq). The balanced chemical reaction is as follows: PCl3 + 3 H 2O → H3PO3 + 3 HCl. Its product, phosphorous acid, is an important precursor for the manufacture of other phosphorous compounds.