The chemical equation K2S + HCl -> 2KCl + H2S

Detailed information about the equation K₂S + HCl -> 2KCl + H₂S:

• K2S is the chemical formula of potassium sulfide, an inorganic sulfide compound.
• HCl is the chemical formula of hydrochloric acid, a colorless liquid with a distinctive smell.
• The reaction occurs between potassium sulfide and hydrochloric acid forming the compound potassium chloride (KCl) and hydrogen sulfide (H₂S).

Reaction conditions:

• The reaction takes place at room temperature and standard pressure.

The reaction process:

• K2S reacts with HCl to produce 2 K+ ions and one S₂- ion.
• The S₂- ion then reacts with two H+ ions from hydrochloric acid to form H₂S.
• The K+ ions then combine with the Cl- ions from hydrochloric acid to form KCl.

Phenomena occurring:

• When the reaction takes place, a distinctive foul smell of hydrogen sulfide is emitted, and a solid mixture of potassium chloride is also formed. Hydrogen sulfide is a toxic gas, so caution must be taken when performing this reaction.