What is Na2Cr2O7? Important knowledge about Na2Cr2O7.

Definition of Na₂Cr₂O₇:
1.1 Names:
1.1.1 Common name: Sodium dichromate.
1.1.2 English name: Sodium dichromate.
1.2. Atomic composition: The molecule Na₂Cr₂O₇ consists of 2 sodium atoms, 2 chromium atoms, and 7 oxygen atoms.
1.3. Atomic mass: The atomic mass of Na₂Cr₂O₇ is 261.97 g/mol.
1.3.1 Molecular structure: The Na₂Cr₂O₇ molecule consists of 2 sodium atoms, 2 chromium atoms connected to each other through 7 oxygen atoms.
1.4 Ion structure: In a solution, Na₂Cr₂O₇ dissociates into 2 Na+ ions and one Cr₂O₇(₂-) ion.

Properties: Na₂Cr₂O₇
2.1 Physical properties of Na₂Cr₂O₇
State: Solid at room temperature.
Color: Reddish-orange or reddish-brown.
Smell: Odorless.
PH level: Very acidic.
2.2 Chemical properties of Na₂Cr₂O₇: Sodium dichromate is a strong oxidizing agent, it can oxidize many other substances.

Common chemical equations involving Na₂Cr₂O₇
Reaction with Metals, Acids, Non-metals, and Salts: Due to its strong oxidizing property, it can react with many substances such as metals, acids, non-metals, and salts.

Synthesis of Na₂Cr₂O₇
4.1 Laboratory synthesis of Na₂Cr₂O₇: Sodium dichromate is typically synthesized from the reaction of sodium chromate sulfate with sodium hydroxide and oxygen.
4.2 Industrial synthesis of Na₂Cr₂O₇: On an industrial scale, it is produced from chromium oxide and a solution of sodium hydroxide, then oxidized by air.