When lithium nitride, li3n(s) , is treated with water, h2o(l) , ammonia, nh3(g) , is produced. predict the formula of the gas produced when sodium phosphide, na3p(s) , is treated with water. formula: na_{3}p(aq) +h_{2}o(l) -> f_{3}(g) +naoh(aq) na3p(aq)+h2o(l)⟶ph3(g)+naoh(aq) write the balanced equation for the reaction of na3p(s) with h2o(l) . phases are optional. balanced equation: na_{3}p +3 h _{2}o-> ph_{3} +3naoh

The gas produced when sodium phosphide reacts with water is phosphine.

Explanation:

When sodium phosphide reacts with water molecule, it leads to the production of flammable, poisonous gas known as phosphine along with the production of sodium hydroxide.

The chemical reaction for the reaction of sodium phosphide with water follows the equation:

By Stoichiometry of the reaction:

1 mole of sodium phosphide reacts with 3 moles of water to produce 1 mole of phosphine gas and 3 moles of sodium hydroxide.

Hence, the gas produced when sodium phosphide reacts with water is phosphine.