The equation CaS + 2HCl -> CaCl2 + H2S

  1. Detailed information about the chemical equation CaS + 2HCl -> CaCl2 + H2S:

    • CaS is a compound of calcium and sulfur, known as calcium sulfide.
    • HCl is hydrochloric acid, also known as muriatic acid.
    • CaCl2 is a compound of calcium and chlorine, known as calcium chloride.
    • H2S is a compound of hydrogen and sulfur, known as hydrogen sulfide, which is a toxic gas.

  2. Reaction conditions:

    • This reaction occurs under normal conditions.

  3. Reaction process:

    • Calcium sulfide (CaS) reacts with hydrochloric acid (HCl) to form calcium chloride (CaCl2) and hydrogen sulfide (H2S).
    • This reaction is an ion exchange reaction.

  4. Occurrence phenomena:

    • When the reaction occurs, the foul smell of hydrogen sulfide is emitted.

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