The solution of a sample in a tube will be... | JAMB UTME - Chemistry - 1979

Question 1 Report

The solution of a sample in a tube will be identified as a chloride if it gives

a white precipitate on addition of AgNO₃ and barium chloride solutions

a white precipiate when acidified with HCI, and then AgNO₃ solution added

a white precipitate when acidified with dilute HNO₃ and then AgNO₃ solution added

a white precipitate when acidified with dilute H₂SO₄ and then barium nitrate solution added

a pungent smell of chlorine gas when dilute HCI and MnO₂ are added

Answer Details

The solution of a sample in a tube will be identified as a chloride if it gives a white precipitate when acidified with dilute HNO3 and then AgNO3 solution is added. This is because the test is a confirmatory test for chloride ions, and the white precipitate formed is silver chloride (AgCl). Chloride ions react with silver nitrate (AgNO3) to form a white precipitate of AgCl, which is insoluble in water and dilute nitric acid.

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Periodic Chemistry (Ghana Only)

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The solution of a sample in a tube will be identified as a chloride if it gives

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