What is SnO2? Important knowledge about SnO2.

1. Definition of SnO₂

SnO₂, also known as Stanic Oxide or Mercury Oxide, is a compound that contains two Oxygen atoms and one Tin atom. In English, it is called Tin (IV) Oxide. The molar mass of SnO₂ is 150.71 and the atomic masses are 118.71 for Sn and 32 for O. The molecular structure of SnO₂ includes a central Tin atom linked to two Oxygen atoms.

2. Properties: SnO₂

2.1 Physical properties of SnO₂
SnO₂ is solid at room temperature, odorless, and ranges in color from white to brown. There is no information on the pH of SnO₂.

2.2 Chemical properties of SnO₂
SnO₂ is stable under high temperatures, insoluble in water and dilute acid, but soluble in strong acids such as concentrated and hot sulfuric acid.

3. Common chemical equations for SnO₂
   SnO₂ reacts with a strong acid to form salt and water, such as the reaction with sulfuric acid: SnO₂ + 2H₂SO₄ -> Sn(SO₄)₂ + 2H₂O.

4. Synthesis of SnO₂

4.1 Laboratory synthesis of SnO₂
Sn + O₂ -> SnO₂, i.e. when Tin is heated in air, it forms SnO₂.

4.2 Industrial synthesis of SnO₂
In industry, SnO₂ is produced by burning coal containing Sn, then SnO₂ is recovered from the exhaust gas.