What is K2CO4? Important knowledge about K2CO4.

1. Definition of K₂CO₄

1.1 Names
1.1.1 Common name: K₂CO₄ is commonly known as Potassium carbonate or pure Potassium carbonate.
1.1.2 English name: K₂CO₄ is called Potassium carbonate in English.
1.2. Atomic mass: The atomic mass of K₂CO₄ is 138.2055 g/mol.
1.3. Atomic weight: The atomic weight of K₂CO₄ is calculated by summing the weights of all the atoms in a K₂CO₄ molecule.
1.3.1 Molecular structure: K₂CO₄ molecule is composed of 2 potassium atoms (K), 1 carbon atom (C), and 3 oxygen atoms (O).
1.4 Ion structure: In solution, K₂CO₄ dissociates into 2 K+ ions and 1 CO₃- ion.

2. Properties: K₂CO₄

2.1 Physical properties of K₂CO₄
State: Solid, colorless crystal
Color: Colorless
Odor: Odorless
pH: K₂CO₄ is strongly alkaline (pH>7 when dissolved in water)
2.2 Chemical properties of K₂CO₄: K₂CO₄ reacts with acid to produce corresponding potassium salt and CO₂ gas.

3. Common chemical equations involving K₂CO₄
   Metal reaction [If any]
   Acid reaction [If any]
   K₂CO₄ + H₂SO₄ -> K₂SO₄ + H₂O + CO₂
   Nonmetal reaction [If any]
   Reaction with salt [If any]

4. Synthesis of K₂CO₄

4.1 Laboratory synthesis of K₂CO₄: K₂CO₄ can be synthesized by reacting K₂O with CO₂.
K₂O + CO₂ -> K₂CO₄
4.2 Industrial synthesis of K₂CO₄: In industry, K₂CO₄ is usually produced by electrolysis of KCl solution.