Question

Predict the formula of the gas produced when sodium phosphide, Na3P(s), is treated with water.

Answer 1

The answer to your question is
PH3 (g)

Answer 2

The formula of the gas produced is
`PH_3`.

Step-by-step explanation:

Whenever metal phosphides reacts with water they form phosphine gas and alkaline solution of metal hydroxide.

`M_3P_x(s)+3xH_2O(l)\rightarrow 3M(OH)_x(aq)+xPH_3(g)`

So, when sodium phosphide is treated with water it gives phosphine gas and sodium hydroxide solution as a product.

`Na_3P(s)+3H_2O(l)\rightarrow 3NaOH(aq)+PH_3(g)`

The formula of the gas produced is
`PH_3`.