What is the test for sulfate (SO42−\text{SO}_4^{2-}SO42−) ions?
Add a few drops of dilute hydrochloric acid then a few drops of barium chloride solution.
Add a few drops of dilute nitric acid then a few drops of silver nitrate solution.
Add a few drops of dilute sulfuric acid then a few drops of barium chloride solution.
Add a few drops of dilute hydrochloric acid then a few drops of silver nitrate solution.