Identifying Ions

• What is the focus of the required practical mentioned?

  Carrying out chemical tests for ions
• What does the lilac flame test indicate?

  Presence of potassium ion
• What does a yellow precipitate with silver nitrate indicate?

  Presence of iodide ion
• What is compound A identified as?

  Potassium iodide
• What does an orange-red flame test indicate?

  Presence of calcium ion
• What does effervescence with hydrochloric acid indicate?

  Presence of carbonate ion
• What is compound B identified as?

  Calcium carbonate
• What does a blue precipitate with sodium hydroxide indicate?

  Presence of copper(II) ion
• What does a white precipitate with barium chloride indicate?

  Presence of sulfate ion
• What is compound C identified as?

  Copper(II) sulfate
• What are the key tests for identifying metal and non-metal ions?

  • Flame tests for metal ions
  • Sodium hydroxide solution for metal ions
  • Tests for non-metal ions: carbonate, halide, sulfate
• How can students effectively learn the tests for ions?

  • Create flashcards
  • Practice repeatedly until memorized
  • Review regularly to reinforce knowledge
• Where can students find more questions on testing for ions?

  In the revision workbook