What is Mg2Cr2O7? Important knowledge about Mg2Cr2O7.

Mg₂Cr₂O₇, also known as Magnesium dichromate, is a chemical substance with a molecular weight of 252.2 g/mol. The molecular structure consists of 2 magnesium atoms, 2 chromium atoms, and 7 oxygen atoms. In this compound, magnesium forms Mg₂+ ion while the Cr₂O₇ 2- ion pair is dichromate.

Properties of Mg₂Cr₂O₇:
2.1 Physical properties: Magnesium dichromate exists as a red-orange powder with no distinctive smell. It is an acidic compound with a low pH.
2.2 Chemical properties: Magnesium dichromate can decompose at high temperatures, generating oxygen and other products like MgCrO₄.

Common reactions:
3.1 Magnesium dichromate can react with metals such as iron, zinc to produce corresponding magnesium salts and dichromates.
3.2 It can also react with acids like H₂SO₄ to produce H₂Cr₂O₇.
3.3 Mg₂Cr₂O₇ does not react with nonmetals like sulfur, phosphorus.
3.4 When interacting with salts, Mg₂Cr₂O₇ usually produces other salts.

Synthesis of Mg₂Cr₂O₇:
4.1 In the laboratory, Magnesium dichromate is usually synthesized from Cr₂O₃, magnesium, and oxygen, with temperature and pressure adjustments.
4.2 In industry, Mg₂Cr₂O₇ is typically produced from natural chromium sources such as chromite.