Question

write the chemical reactions representing the formation of sulphurous acid from sulphur.

Answer 1

This can't be done by simply adding water to the sulphur trioxide - the reaction is so uncontrollable that it creates a fog of sulphuric acid. Instead, the sulphur trioxide is first dissolved in concentrated sulphuric acid: The product is known as fuming sulphuric acid or oleum.

Answer 2

this is a correct answer