The equation FeS + 2HCl -> FeCl2 + H2S

Detailed information about the FeS + 2HCl -> FeCl₂ + H₂Sequation:
The above chemical equation describes the reaction between iron sulfide (FeS) and hydrochloric acid (HCl) to form iron(II) chloride (FeCl₂) and hydrogen sulfide (H₂S).

Conditions of the reaction:
This reaction occurs at room temperature and standard pressure.

The reaction process:

• Step 1: FeS and HCl react with each other to form an intermediate compound.
• Step 2: The intermediate compound continues to react with HCl to form FeCl₂ and H₂S.

Phenomena occurring:
When the reaction occurs, the reaction environment will have a foul smell due to the generation of H₂S gas. Additionally, the solution also changes color due to the formation of FeCl₂.