identifying non-metal ions

• test for a CARBONATE ion

  • add dilute acid
  • carbondioxide will be produced , effervesence will be observed ( this doesnt prove that carbondioxide has been produced )
  • to test for carbondioxide bubble it in lime water if its cloudy it means co2 is present meaning the starting solution contained carbonate
• halide ion

  1. add dilute nitric acid
  2. add silver nitrate solution
  3. each halide produced a precipitate of silver halide
• silverCHLORIDE - white precipitate
• silverBROMIDE - cream precipitate
• silverIODIDE - yellow precipitate
• sulphate

  • add dilute HCL acid
  • add barium chloride
  • white precipitate