Question

Write sulfur dioxide reactions

Answer 1

Sulfur dioxide is a covalent bond because we have two non-metals (Sulfur and Oxygen).

`S + O_(2) \to SO_(2)` (Sulfur dioxide formula)

It's called Sulfur dioxide but it can be called Sulfurous anhydride and Sulfur (lV) oxide.

Sulfur dioxide can have different reactions:

• In the presence of oxygen oxidation of sulfur dioxide to sulfur trioxide occurs and the formula is:

`SO_(2)+(1)/(2) O_(2)= SO3`

The equal is because it's a reversible equation. This reaction is spontaneous.

• The sulfur trioxide reacting with water produces sulfuric acid. The formula is:

`3 SO_(2) + O_(3) \to 3 SO_(3)\\SO_(3) + H_(2)O \to H_(2)SO_(4)`

• Also the sulfur dioxide reacting with sodium hydroxide produces sodium sulfite and the formula is:

`SO_(2) + 2 NaOH \to Na_(2)SO_(3) + H_(2)O`

• And finally we have the reduction of sulfur dioxide (it can be in presence of hydrogen sulfide) getting elemental sulfur and water. The formula is:

`SO_(2) + 2 H_(2)S \to 3 S + 2 H_(2)O`