Question

Suphur trioxide is not dissolved in water during contact process.Give reasons

Answer 1

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Answer 2

When dissolved in water, sulfur trioxide forms a “mist” of sulfuric acid, which can be difficult to store and handle. Because of this, in order to form sulfuric acid, an intermediate called “oleum” must be formed, where SO3 is dissolved in H2SO4, giving H2S2O7. This is then dissolved in water to form sulfuric acid.