Английская Википедия:Copper oxalate
Copper oxalate is an inorganic compound, a salt of copper metal and oxalic acid with the chemical formula Шаблон:Chem.[1] The compound is practically insoluble in water, alcohol, ether, and acetic acid but soluble in ammonium hydroxide.[2] Copper oxalate forms a hydrate, which forms acid-blue crystals.
Synthesis
Copper oxalate can be produced by precipitation from a mixture of a copper (II) salt and a sodium oxalate solution or by reacting copper sulfate with oxalic acid.[3]
- <math>\mathsf{CuSO_4 + H_2C_2O_4 + H_2O \ \xrightarrow{}\ CuC_2O_4\cdot H_2O\downarrow + H_2SO_4 }</math>
Properties
As a hemihydrate, copper oxalate is a blue-white solid that is practically insoluble in water. At 200 °C, it loses its water of crystallization.
The compound also forms complex salts with alkali metal oxalates and ammonium oxalate:
- <math>\mathsf{CuC_2O_4 + K_2C_2O_4 + 2 H_2O \ \xrightarrow{}\ K_2[Cu(C_2O_4)_2]\cdot 2 H_2O }</math>
Uses
Copper oxalate is used as a catalyst for organic reactions, as a stabilizer for acetylated polyformaldehyde[4] and in seed treatment (to repel birds and rodents).Шаблон:Fact
See also
References
Шаблон:Copper compounds Шаблон:Oxalates
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