Question

Why certain anions only react with dil h2so4?

Answer 1

Answer:

HCl is weaker acid and thus it will not react with all anions.But conc. H2SO4 is a strong acid that reacts with all acids .In qualitative analysis we want to identify the anions and by proceeding step wise , we may rule out the anions that react with both acids if the anion reacts with HCl and vice versa.

Answer 2

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