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Question Question 2(2007)
How will the addition of barium chloride soln. help to distinguish between dil. HCl and dil. H2SO4.
Barium chloride reacts with dil H2SO4 to form a white ppt. of barium sulphate.
BaCl2 + H2SO4 [dil.] ⟶ 2HCl + BaSO4 ↓ [white ppt.]
Whereas, dil. HCl does not form a white ppt. Hence, the two can be distinguished.
BaCl2 + HCl [dil.] ⟶ No white ppt.