Question

What happens when sulphur burns in the presence of oxygen ? how will you show that the compound formed in this reaction is acidic in nature ??

Answer 1

Heya,

When sulphur reacts with oxygen, it forms sulphur dioxide.

The reaction is as follows:-

S + O2 -------> SO2

One proof that it is acidic is that we have learnt that non-metal oxides are acidic.

But to prove that let's react this oxide with water:-

SO2 + H2O ------>H2SO3

H2SO3 is sulphurous acid.

So we can conclude that it is an acidic oxide.
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