What is HI? Important knowledge about HI.

  1. Definition of HI
    HI, or Hydrogen iodide, is an inorganic substance containing two elements: hydrogen and iodine. Its English name is Hydrogen iodide. HI has a molecular mass of 128. In the HI molecule, a hydrogen atom combines with an iodine atom through a covalent bond to form the HI molecule. When dissociated in solution, HI forms H+ and I- ions.

  2. Properties of HI
    2.1 Physical properties of HI
    Under standard conditions, HI is a colorless gas with a distinctive smell. It is a strong acid, so caution is required to avoid burns when in contact. When in solution, it has a low pH.
    2.2 Chemical properties of HI
    HI readily reacts with metals to form iodide compounds of those metals. HI also readily reacts with nonmetals such as sulfur, chlorine, bromine to form corresponding compounds.

  3. Common chemical equations of HI
    The reactions of metals, acids, nonmetals, and salts of HI are all very common, often used in high school chemistry experiments.

  4. Preparation of HI
    HI can be prepared in the laboratory or industrially. In the lab, HI is usually prepared by reacting iodine with hydrogen. In industry, HI is prepared by reacting iodine with steam at high temperatures and pressures.

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