What is KH2PO2? Important knowledge about KH2PO2.

1. Definition of KH₂PO₂:
   KH₂PO₂ is also known as potassium dihydrogen phosphate. It is an organic compound composed of potassium (K), hydrogen (H), and phosphorus (P) atoms. In the conventional formula KH₂PO₂, there is one potassium atom, two hydrogen atoms, and one phosphorus atom.

1.1. Common name: Potassium dihydrogen phosphate.
1.2. English name: Potassium dihydrogen phosphate.
1.3. Atomic mass: K (39.10), H (1.01), P (30.97), O (16.00).
1.4. Molecular weight: 136.09 g/mol.
1.5. Molecular structure: Consists of one potassium atom, two hydrogen atoms, and one phosphorus atom.
1.6. Ion structure: KH₂PO₂ has 3 main ions which are K+, H+ and PO₄ 3-.

2. Characteristics:
   2.1. Physical properties: KH₂PO₂ is a solid, white substance, odorless, with a neutral pH.
   2.2. Chemical properties: KH₂PO₂ is easily soluble in water and has weak acidity.

3. Chemical reactions:
   3.1. Reaction with metals: KH₂PO₂ does not react with metals.
   3.2. Reaction with acids: KH₂PO₂ reacts with acid to produce salt (K₃PO₄) and water.
   3.3. Reaction with non-metals: KH₂PO₂ does not react with non-metals.
   3.4. Reaction with salts: KH₂PO₂ reacts with salts to produce another salt and water.

4. Synthesis of KH₂PO₂:
   4.1. Lab synthesis: KH₂PO₂ can be synthesized from K₃PO₄ and H₂SO₄.
   4.2. Industrial synthesis: KH₂PO₂ is produced by reacting K₂HPO₄ with HCl.