C4.2 Flashcards
Flame test colour for Lithium
Red
Flame test colour for Sodium
Yellow
Flame test colour for Potassium
Lilac
Flame test colour for Calcium
Bright orange/red
Flame test colour for Copper
Blue/green
Iron (II) colour precipitate
Green
Iron (III) colour precipitate
Orange-brown
Copper colour precipitate
Blue
Calcium colour precipitate
Cloudy
Zinc colour precipitate
Cloudy
Sulfate ion precipitate colour
Cloudy
Carbonate ion precipitate colour
Cloudy
Chloride colour precipitate
Cloudy
Bromide colour precipitate
Creamy
Iodide colour precipitate
Yellow
Equation for sulfate ion test
Ba²⁺(aq) + SO4²⁻(aq) → BaSO4(s)
Carbonate ion test equation
2H⁺(aq) + CO₃²⁻(aq) → CO₂(g) + H₂O(l)
How to test for Metal cations
Add sodium hydroxide solution and precipitate should form
How to test for Non-metal anions
Add barium chloride and then some dilute hydrochloric acid.
How to test for halide ions (Chlorine, Bromine, Iodine)
Add dilute nitric acid then silver nitrate
