What is AlI3? Important knowledge about AlI3.

  1. Definition of AlI3:
    1.1 Names:

    • Common name: Aluminum iodide, also known as iodide aluminum.
    • English name: Aluminum iodide.
      1.2 Atomic mass: consists of 1 aluminum atom (Al) and 3 iodine atoms (I).
      1.3 Atomic weight: 407.695 g/mol.
      1.4 Ion structure: Aluminum has a valence number of +3, iodine has a valence number of -1. When combined, aluminum and iodine form the Al3+ ion and 3 I- ions.

  2. Properties:
    2.1 Physical properties of AlI3:

    • State: solid at room temperature.
    • Color: colorless or white.
    • Odor: no special odor.
    • pH value: not applicable.
      2.2 Chemical properties of AlI3: AlI3 reacts strongly when in contact with water, forming Al(OH)3 and HI.

  3. Common chemical equations:

    • Al + 3I2 -> 2AlI3: Reaction of aluminum with iodine to form aluminum iodide.
    • AlI3 + 3H2O -> Al(OH)3 + 3HI: Reaction of aluminum iodide with water to form aluminum hydroxide and hydriodic acid.

  4. Preparation of AlI3:
    4.1 Laboratory preparation: Typically, AlI3 is prepared from aluminum and iodine at high temperatures.
    4.2 Industrial preparation: On an industrial scale, AlI3 is usually prepared from aluminum and iodine in an air environment.

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