tests for anions

• describe the test for carbonate anions

  • use a pipette to add add dilute acid
  • connect test tube to a test tube containing limewater
  • if carbonate ions are present, the limewater will turn cloudy when bubbled
• describe the test for halide anions:

  • use a pipette to add dilute nitric acid
  • add silver nitrate solution
• describe the test for sulfate anion

  • use a pipette to add dilute hydrochloric acid
  • & add barium chloride solution
  • if sulfate ions are present, a white precipitate of barium sulfate will form
• what is an anion?

  particle with a negative charge, formed when electrons are gained
• what precipitate is given from bromide ions (halide)?

  cream precipitate of silver bromide
• what precipitate is given from chloride ions (halide)?

  white precipitate of silver chloride
• what precipitate is given from iodide ions (halide)?

  yellow precipitate of silver iodide