In three test tubes, numbered are solutions of sodium carbonate, sodium sulfate, sodium chloride ..

| June 22, 2021 | education

Salt solutions can be determined using qualitative ion reactions.

1) Test tube № 1 contains sodium carbonate salt solution. carbonates are determined in reactions with acids, with the release of carbon dioxide. Add hydrochloric acid to the test tube with sodium carbonate. Strong acid displaces weak carbonic acid from solutions of its salts. Carbonates are recognized by the release of carbon dioxide bubbles in reactions with acids.

2) A solution of sodium sulfate is poured into test tube No. 2. the presence of sulfate – ions in the solution is determined using a reagent containing barium ions. as a result of the reaction, a white precipitate is formed, insoluble in water.

3) Test tube № 3 contains a silver chloride solution. The presence of chloride ions in the solution is determined using a reagent (silver nitrate). At the end of the reaction, silver chloride settles in the test tube in the form of a white lumpy precipitate.



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