Question

How is phosphine prepared using the following reagent ?
HCl

Answer 1

Preparation of Phosphine using HCl :
The reaction of calcium phosphide with dilute HCl gives phosphine.

$$\underset{\text{Calcium phosphide}}{\mathrm{Ca}{\phantom{A}}_3\mathrm{P}{\phantom{A}}_2}+6\mathrm{HCl}⟶\underset{\text{Calcium chloride}}{3\mathrm{CaCl}{\phantom{A}}_2}+\underset{\text{ Phosphine}}{2\mathrm{PH}{\phantom{A}}_3}\uparrow$$