C3.4 Test for ions

Flame colour for calcium ions

• Blue
• Red
• Green
• Yellow

Flame colour for sodium ions

• Blue
• Red
• Green
• Yellow

Flame colour for lithium ions

• Blue
• Crimson
• Green
• Yellow

Metal ion with a lilac flame

• Na⁺
• K⁺
• Na²⁺
• K²⁺

Colour of precipitate when sodium hydroxide is added to a Calcium ion solution.

• White
• Brown
• Green
• Blue

Colour of precipitate when sodium hydroxide is added to a copper(II) ion solution.

• White
• Brown
• Green
• Blue

Colour of precipitate when sodium hydroxide is added to a iron(II) ion solution.

• White
• Brown
• Green
• Blue

Colour of precipitate when sodium hydroxide is added to a iron(III) ion solution.

• White
• Reddish-Brown
• Green
• Blue

How can you tell if you have aluminium ions when you add sodium hydroxide?

• Get a white precipitate.
• Get a cream precipitate.
• Get a white precipitate that dissolves in excess
• Get a cream precipitate that dissolves in excess

Test for bromide ions is....

• Add hydrochloric acid
• Add barium chloride
• Add nitric acid then silver nitrate