Question

i. How is SO, prepared in laboratory
from sodium sulfite? Give two physical
properties of So,Describe​

Answer 1

Answer:

Sodium sulfite (sodium sulphite) is the inorganic compound with the chemical formula Na2SO3. A pale yellow, water-soluble solid, it is used commercially as an antioxidant and preservative. A heptahydrate is also known but it is less useful because of its greater susceptibility toward oxidation by air.

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Answer 2

Answer:

We can create sulphur dioxide in the laboratory by the action of dilute sulphuric acid on sulphites

Na2SO3 + H2SO4 → Na2SO4 + H2O + SO2↑

Sodium sulphite Sulphuric acid Sodium sulphate water Sulphur dioxide

physical properties of SO are As a reducing agent it is used in the textile industry as a bleaching, desulfurizing, and dechlorinating agent (e.g. in swimming pools). Its reducing properties are exploited in its use as a preservative to prevent dried fruit from discoloring, and for preserving meats.