Question

Write balanced chemical equations involved in the following reactions:
(a) Fluorine gas reacts with water.
(b) Phosphine gas is absorbed in copper sulphate solution.

Answer 1

(i) Fluorine gas reacts with water-

Fluorine reacts violently with water forming hydrogen fluoride and oxygen gas is evolved.So the balanced chemical equation will be:

$2{F_2}_{\left(g\right)}+2{H_{2}O}_{\left(l\right)}⟶4{HF}_{(aq.)}+{O_2}_{\left(g\right)}$

(ii) When phosphine gas is absorbed in copper sulphate solution, it gives black precipitate of cupric phosphide and sulphuric acid. So the balanced chemical equation will be.

$2P{H}_3+3CuS{O}_4⟶{Cu}_3{P}_2+3H_{2}S{O}_4$