Question

name the gas which which gives white precipitate with silver nitrate solution

Answer 1

A white precipitate of barium sulfate forms if sulfate ions are present. The hydrochloric acid is added first to remove any carbonate ions that might be present - they would also produce awhite precipitate, giving a false positive result. Barium nitrate solutioncan be used instead of barium chloridesolution.

Answer 2

white precipitate of barium sulfate forms if sulfate ions are present. The hydrochloric acid is added first to remove any carbonate ions that might be present - they would also produce a white precipitate, giving a false positive result. Barium nitrate solution can be used instead of barium chloride solution
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