Question

write any two charaterstics property of sulpur dioxide​

Answer 1

Answer:

✯Properties of Sulphur Dioxide

• It is a colourless gas with a rotten egg odour. It is highly soluble in water.

• It liquefies easily.

• SO2 dissolves in water to form sulphurous acid due to which it possesses an acidic character.

$\ \boxed{H _{2} O + SO _{2} O→ H_{2}SO_{3}}$

• It does not support combustion nor is it combustible.

• SO2 is a strong oxidizing agent.

$\boxed{2H _{2} S + SO_{2} → 3S + 2H_{2} O}$

• It also acts as a reducing agent.

$\boxed{SO _{2} + 2H_{2} O → H_{2} SO_{4} + 2H}$

Explanation:

◉LET'S EXPLORE MORE

✯Sulfur dioxide

Sulfur dioxide has the chemical composition of

$SO _{2}$

and is also commonly referred to as sulfurous acid anhydride, sulfurous anhydride or sulfur oxide.

✯Structure of Sulphur Dioxide

This compound is a bent molecule and has a bond order of 1.5. The resonance structure can be described using the valence bond theory using s and p orbitals.

✯Preparation of Sulphur Dioxide

1. In the laboratory, sulphur dioxide is prepared by the reaction of metallic sulphite or a metallic bisulphite with dilute acid. For example, a reaction between the dilute sulphuric acid and sodium sulphite will result in the formation of SO2.

$\boxed{ \sf \: Na _{2} SO _{3}+ H_{3}SO _{4}→ Na_{2}SO_{4}+ H_{2}O + SO_{2}}$

2. Commercially it is obtained as a by-product released from the roasting of sulphide ores. The gas obtained is dried, liquefied and then stored in steel cylinders.

$\boxed{ \sf4FeS _{2}  (s) + 11 O_{2} (g) →2Fe_{2}O_{3}(s) + 8SO_{2}(g)}$

✯Uses of Sulphur Dioxide

• In the food industries, as a food preservative.

• It acts as a bleaching agent to remove the excess chlorine and as a disinfectant.

• In cold storage plant, it acts as a refrigerant.

• It is used as a reagent and a solvent in the laboratory.

Safety measures have to be taken against sulphur dioxide as inhaling this gas causes serious health problems such as premature death and respiratory problems.

✯Solved Example

☆Question

$\sf \: What \: happens \: when \\ </p><p></p><p> \sf \: Concentrated \: H _{2}SO _{4} \: is \: added \: to \: calcium \: fluoride \\ </p><p> \sf \: So _{3} \: is \: passed \: through \: water?$

☆Solution

$\sf \: It \: forms \: hydrogen \: fluoride \\ </p><p></p><p> \sf \: CaF _{2}+ H_{2}SO_{4}–> CaSO_{4}+ 2HF \\ </p><p></p><p> \sf \: It \: dissolves \: SO_{3}to \: give \: H_{2}SO_{4}. \\ </p><p></p><p> \sf \: SO _{3}  + H_{2}O –> H_{2}SO_{4}\\ </p><p></p><p>$