Sulfur trioxide (SO₃)
One of the oxides of sulfur, forms sulfuric acid with water.
sulfur trioxide, molecule, sulphuric acid, sulphuric acid production, molecular shape, volcanic gases, oleum, disulphuric acid, inorganic chemistry, chemistry
Sulfur trioxide SO₃
Molar mass: 80.06 g/mol
Molecular shape: triangle
Bond angle: 120°
Melting point: 16.8 °C (62.24 °F)
Boiling point: 45 °C (113 °F)
Density: 1.93 g/cm³ (0.0697 lb/in³)
Sulfur trioxide is one of the oxides of sulfur, a thick, colorless liquid at room temperature. When stored for a longer period of time, it is converted into a crystalline variant. It reacts intensely with water, while forming sulfuric acid. It dissolves well in concentrated sulfuric acid and forms oleum. It is a strong oxidant; it carbonizes carbohydrates and other organic compounds. It causes serious burns on the skin.
Occurrence and production
Sulfur trioxide is produced during the catalytic oxidation of sulfur dioxide. It occurs naturally in volcanic gases.
It is used in industrial quantities in the production of sulfuric acid.
Sulfur dioxide emission is the main cause of acid rains. It is an intermediate product in the production of sulfuric acid.
A compound of sulfur often used as a pesticide.
A colorless, toxic gas with the characteristic odor of rotten eggs. It occurs in certain mineral waters and spring waters.
A compound ion produced when sulfuric acid releases a proton.
An odorless, yellow, solid substance, the 16th most common in the Earth´s crust. One of the best known sulfur compounds is pyrite, also known as ´fool´s gold´.
A colorless, viscous liquid, a highly corrosive, strong acid used in several industrial processes.
Colorless, moderate acid, only known in aqueous solution.
An exercise about compound ions.