19. An unknown solution containing salts of two of the four elements barium, calcium, magnesium, and strontium gives no reaction with sulfuric acid. Based on the table, the unknown solution probably contains:
Answer and Explanation
Your Answer is
Correct Answer is C
Explanation
Look at the table, when sulfuric acid sulfuric acid is added to the barium nitrate solution, a white precipitate is formed, and the white precipitate should be barium sulfate, so the solution in the question does not react with sulfuric acid, so it should not contain barium, and the same reason will not Contains strontium