iGCSE Chemistry - tests for ions and gases

Flame colour for sodium ions

• Blue
• Red
• Green
• Yellow

Flame colour for lithium ions

• Blue
• Red
• Green
• Yellow

Metal ion with a lilac flame

• Na⁺
• K⁺
• Na²⁺
• K²⁺

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
• Brown
• Green
• Blue

Test for bromide ions is....

• Add acid
• Add barium chloride
• Add silver nitrate

Test for carbonate ions is....

• Add acid
• Add barium chloride
• Add silver nitrate

Test for sulphate ions is....

• Add acid
• Add barium chloride
• Add silver nitrate

NH₄⁺¹

• nitrogen hydride
• ammonia
• ammonium
• nitrogen hydrogen