What is K2Cr2O7? Important knowledge about K2Cr2O7.

Definition of K₂Cr₂O₇
K₂Cr₂O₇, also known as Potassium dichromate or Dicromat kali in Vietnamese, is an inorganic chemical compound. Its molecular structure consists of two potassium (K) atoms, two chromium (Cr) atoms, and seven oxygen (O) atoms. It has a molar mass of 294.2 g/mol. In water, K₂Cr₂O₇ ionizes into 2K+ and Cr₂O₇-2.

Properties: K₂Cr₂O₇
K₂Cr₂O₇ is a solid substance with a distinctive orange color and odorless. In liquid form, it creates a solution with an orange-red color, and its pH is usually neutral or slightly acidic. Chemically, K₂Cr₂O₇ is a strong oxidizing agent, capable of oxidizing many other substances such as metals, acids, and many non-metals.

Common chemical equations involving K₂Cr₂O₇
K₂Cr₂O₇ often participates in various oxidation reactions. In reactions with metals, it can transform metals into metal ions. When acting on acids, it can convert acids into oxygen acids. As for non-metals, it has the ability to turn non-metals into oxygen non-metals.

Preparation of K₂Cr₂O₇
K₂Cr₂O₇ can be prepared through the reaction of K₂CO₃, Cr₂O₃, and O₂ at high temperatures. In the laboratory, K₂Cr₂O₇ is usually prepared by separating Cr₂O₃ from the chromite mineral. On an industrial scale, it is often produced by oxidizing K₂CrO₄ with sulfuric acid.