Ions

• What kind of wire do you use to do a flame test?

  Nichrome Wire
• What substance would you use to clean Nichrome wire?

  Hydrochloric Acid
• Why is it important that the Nichrome Wire is clean before the flame test?

  To ensure there is no impurity in the sample which would lead to inaccurate results
• What colour do Ba 2+ ions burn?

  Apple Green
• What colour do Ca 2+ ions burn?

  Brick Red
• What colour do Cu 2+ ions burn?

  Blue / Green
• What colour do Li+ ions burn?

  Red
• What colour do K+ ions burn?

  Lilac
• What colour do Na+ ions burn?

  Yellow
• Al 3+ forms a ____ precipitate when _____ is added

  White, NaOH
• Cu 2+ forms a ____ precipitate when _____ is added

  Blue, NaOH
• Fe 2+ forms a ____ precipitate when _____ is added

  Green, NaOH
• Fe 3+ forms a ____ precipitate when _____ is added

  Brown, NaOH
• Mg2+ forms a ____ precipitate when _____ is added

  White, NaOH
• Ca 2+ forms a ____ precipitate when _____ is added

  White, NaOH
• Cl- forms a ____ precipitate when _____ is added


  White, HNO3 + AgNO3
• Br- forms a ____ precipitate when _____ is added

  Cream, HNO3 + AgNO3
• I- forms a ____ precipitate when _____ is added


  Yellow, HNO3 + AgNO3
• SO4 2- forms a ____ precipitate when _____ is added

  White, HCl + BaCl2
• What happens when you add CO3 2- ions to any acid?

  effervescence, limewater turns milky (CO2 produced)
• NH4 + produces _____ gas when ______ is added. turns red litmus paper _____

  NH3, NaOH, Blue