Tests for positive ions

• What colour flame do Lithium ions turn?

  Crimson
• What colour flame do Sodium ions turn?

  Yellow
• What colour flame do Potassium ions turn?

  Lilac
• What colour flame do Calcium ions turn?

  Orange/Red
• What colour flame do Copper ions turn?

  Green
• Which ion produces this precipitate:

  A) Copper

  
• Which ion produces this precipitate:

  A) Iron 3

  
• Which ion produces this precipitate:

  A) Iron 2

  
• Which ion produces this precipitate:

  A) Calcium

  
• Which ion produces this precipitate:

  A) Ammonia

  
• Which ion produces this precipitate:

  (If you add excess Sodium hydroxide the precipitate dissolves)

  A) Aluminium

  
• What is the formula of Iron (II) and Iron (III) hydroxide?

  • Fe(OH)2
  • Fe(OH)3
• To make a precipitate of certain metals what do you add?

  Sodium Hydroxide