What is Na2C2O4? Important knowledge about Na2C2O4.

Na₂C₂O₄, also known as sodium oxalate, is a chemical compound with the molecular formula Na₂C₂O₄, consisting of two sodium atoms (Na), two carbon atoms (C), and four oxygen atoms (O). The molecular weight of Na₂C₂O₄ is 134.001 g/mol. In terms of molecular structure, the two Na atoms are linked to each C₂O₄ group to form Na+[C₂O₄]2- complex ion.

Sodium oxalate appears as white crystals, odorless. The pH of Na₂C₂O₄ when dissolved in water is relatively neutral. In chemical reactions, Na₂C₂O₄ can react with acid to produce CO₂ and H₂O.

Some common chemical equations of Na₂C₂O₄:

• Reaction with strong acid: Na₂C₂O₄ + 2HCl -> 2NaCl + CO₂ + H₂O
• Reaction with metal: Na₂C₂O₄ + Fe -> FeC₂O₄ + 2Na
• Reaction with salt: Na₂C₂O₄ + CuSO₄ -> CuC₂O₄ + Na₂SO₄

Na₂C₂O₄ can be prepared in the laboratory from the reaction between oxalic acid and sodium hydroxide: H₂C₂O₄ + 2NaOH -> Na₂C₂O₄ + 2H₂O. On an industrial scale, sodium oxalate is produced by dissolving oxalic acid in a solution of sodium hydroxide, then evaporating to obtain the product.