$$PCl_5$$ reacts with finely divided silver on heating and a white silver salt is obtained, which dissolves on adding excess aqueous $$NH_3$$ solution. Write the reactions involved to explain what happens.
$$PCl_{ 5 }+2Ag\rightarrow 2AgCl+PCl_{ 3 }$$
$$AgCl+2NH_{ 3 }(aq)\rightarrow [Ag(NH_{ 3 })_{ 2 }]^{ + }Cl^{ - }$$