What is K2C2O4? Important knowledge about K2C2O4.

Definition of K₂C₂O₄:
K₂C₂O₄ is the chemical formula of potassium oxalate, an oxalate salt of potassium. Its common name is potassium oxalate, and in English, it is called “Potassium Oxalate”. The atomic composition of K₂C₂O₄ basically includes two potassium atoms (K), two carbon atoms (C) and four oxygen atoms (O). The atomic weight of K₂C₂O₄ is 166.22 g/mol. Its molecular structure is formed by the combination of two potassium ions and one oxalate ion.

Properties of K₂C₂O₄:
2.1 Physical properties: K₂C₂O₄ typically appears as colorless or white crystals, odorless, with a pH in the range of 7-8 when dissolved in water.
2.2 Chemical properties: K₂C₂O₄ can react with strong acids to produce CO₂ gas. It can also react with heavy metals to form insoluble fats.

Common chemical equations involving K₂C₂O₄:
An example of the reaction of K₂C₂O₄ with acid:
K₂C₂O₄ + 2HCl -> 2KCl + H₂C₂O₄
H2C2O4 -> H₂O + CO₂ ->

Preparation of K₂C₂O₄:
4.1 Laboratory preparation: K₂C₂O₄ can be prepared by reacting potassium hydroxide with oxalic acid.
KO₂ + H₂C₂O₄ -> K₂C₂O₄ + H₂O
4.2 Industrial preparation: In industry, K₂C₂O₄ is usually produced by the reaction between potassium carbonate and oxalic acid.