POSITIVE & NEGATIVE IONS Flashcards
When this substance undergoes a flame test, a crimson flame is produced. There is no effect of adding sodium hydroxide. When this solution is acidified and barium chloride is added, a white precipitate is formed. What is the substance?
Lithium Sulphate
A blue-green flame is formed when this positive ion undergoes the flame test. When sodium hydroxide is added to this solution, a dark blue precipitate is formed. When this solution is acidified with dilute nitric acid and aqueous silver nitrate is added to it, a yellow precipitate is formed. What is the substance?
Copper Iodide
A Bunsen Burner flame is not affected in a flame test. When sodium hydroxide is added to this solution a white precipitate is formed. This precipitate dissolves however, when excess sodium hydroxide solution is added. When dilute acid is added to the solid form of this compound, vigorous fizzing is observed. What is the substance?
Aluminium Carbonate
