Required Practical 7: Identifying Ions (T)

• What should you be able to do by the end of the video?

  Describe chemical tests for ions
• What is the focus of the required practical discussed?

  Carrying out chemical tests for ions
• Which students is this practical required for?

  Triplet chemistry students
• 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 happens when compound B reacts with hydrochloric acid?

  It effervesces and produces gas
• What does the gas produced in the reaction with hydrochloric acid do to lime water?

  Turns lime water cloudy
• 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 and hydrochloric acid indicate?

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

  Copper(II) sulfate
• What are the steps to identify ions using chemical tests?

  • Perform flame tests for metal ions
  • Use sodium hydroxide for metal ion tests
  • Test for non-metal ions: carbonate, halide, sulfate
  • Observe precipitate colors and reactions
• How can students effectively learn the tests for ions?

  • Create flashcards for each test
  • Practice regularly until memorized
  • Review previous videos for clarification
• What resources are available for additional practice on ion tests?

  • Revision workbook with practice questions
  • Previous videos on chemical tests