Question

Write sulfur dioxide reactions

Answer 1

Answer:

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:

$SO_{2}+\frac{1}{2} O_{2}= SO3$

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:

$SO_{2} + 2 H_{2}S \to 3 S + 2 H_{2}O$