Potassium Zincate

Potassium zincate is a chemical compound with the molecular formula K2ZnO2. It is an inorganic salt that is composed of a potassium cation (K+) and a zincate anion ([Zn(OH)4]2-). The zincate anion contains a central zinc atom that is coordinated to four hydroxide ions.

Potassium zincate can be prepared by reacting zinc oxide (ZnO) with potassium hydroxide (KOH) in water. The reaction produces potassium zincate as well as water molecules. The balanced chemical equation for this reaction is:

ZnO + 2 KOH + H2O → K2ZnO2 + 2 H2O

Potassium zincate is a white crystalline solid that is soluble in water. It has a molar mass of 221.53 g/mol and a density of approximately 2.66 g/cm3. Potassium zincate is used in various industrial applications, including electroplating, metal surface treatment, and as a precursor for the synthesis of other zinc compounds.

It should be noted that potassium zincate can react with acids to produce zinc oxide and potassium salts. Therefore, it should be stored away from acids to prevent decomposition. Additionally, it is important to handle potassium zincate with appropriate safety measures, as it may cause skin irritation and is harmful if ingested or inhaled.