What is KNO2? Important knowledge about KNO2.

  1. Definition of KNO2
    1.1 Names:
    1.1.1 Common name: Potassium Nitrite
    1.1.2 English name: Potassium Nitrite
    1.2 Atomic composition: KNO2 consists of 3 atoms: 1 potassium (K), 1 nitrogen (N), and 2 oxygen (O).
    1.3 Atomic mass: ~85.104 g/mol
    1.3.1 Molecular structure: In the molecule of KNO2, the potassium atom is bonded with the nitrite group -NO2.
    1.4 Ion structure: In solution, KNO2 dissociates into K+ ion and NO2- ion.

  2. Properties of KNO2
    2.1 Physical properties of KNO2:

    • State: solid, crystalline
    • Color: colorless or slightly yellow
    • Odor: odorless
    • PH level: amphoteric (acidic or basic depending on conditions)
      2.2 Chemical properties of KNO2: Strongly reactive with other substances such as acids, bases, metals…

  3. Common chemical equations of KNO2: KNO2 can react with strong acids such as HCl to produce NO2, N2O, or N2 gases depending on the concentration.

  4. Preparation of KNO2
    4.1 Laboratory preparation of KNO2: KNO2 can be prepared from the reaction between KNO3 and FeSO4 in an acidic environment.
    4.2 Industrial preparation of KNO2: On an industrial scale, potassium nitrite is usually produced by reacting potassium nitrate (KNO3) with potassium (K) in a molten environment.

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