Applied science qualitative testing

Flame colour for calcium ions

• Blue
• Brick 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 copper(II) ion solution.

• White
• Brown
• Green
• pale 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

Test for carbonate ions is....

• Add acid, test CO₂ gas with limewater
• Add barium chloride, test CO₂ gas with limewater
• Add silver nitrate, test CO₂ gas with limewater

Test for sulphate ions is....

• Add acid only. forms white precipitate that is insoluble in the acid
• Add barium chloride and then some acid. forms white precipitate that is insoluble in the acid
• Add silver nitrate and then some acid . forms white precipitate that is insoluble in the acid

What is a precipitate?

• an insoluble reactant formed during a chemical reaction
• an insoluble product formed during a chemical reaction
• a soluble solvent in a saturated solution
• a soluble solute in a saturated solution