The chemical equation Ca + 2HCl -> CaCl2 + H2

  1. Detailed information about the chemical equation Ca + 2HCl -> CaCl2 + H2:

    • Ca is the symbol for calcium, a chemical element in Group 2 (alkaline earth metals) of the periodic table, with atomic number 20.
    • HCl is the symbol for hydrochloric acid, a strong acid in aqueous solution, commonly used in chemical reactions.
    • CaCl2 is the symbol for calcium chloride, a solid, white crystal substance at room temperature, with high hygroscopicity.
    • H2 is the symbol for hydrogen, a chemical element in Group 1 (hydrogen group) of the periodic table, with atomic number 1.

  2. Reaction conditions:

    • This reaction occurs efficiently under normal temperature, pressure, and in the acidic environment of HCl.

  3. Reaction process:

    • Calcium reacts with hydrochloric acid in the ratio of 1:2 to form calcium chloride and hydrogen.

  4. Observed phenomena:

    • When calcium is added to a solution of HCl, bubbles of hydrogen gas begin to evolve. The solution after the reaction contains calcium chloride.

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