Chemical Tests

Cards (19)

Li+ Flame Test 
Red
Na+ Flame Test 
Yellow
K+ Flame Test 
Lilac
Ca2+ Flame test 
Orange-red
Cu2+ Flame Test 
Blue-green
Cu2+ Cation Test 
Blue Precipitate
Fe2+ Cation Test 
Green Precipitate
Fe3+ Cation Test 
Brown-Orange Precipitate
Cl- Anion Test 
White Precipitate
Br- Anion Test 
Cream Precipitate
I- Anion Test 
Yellow precipitate
For the sulphate test, add dilute hydrochloric acid and then barium chloride. The hydrochloric acid reacts with other ions to prevent false positives. The result is a milky white precipitate.
For the flame test, dip the nichrome wire into hydrochloric acid to clean off any excess. Then place into solid and into a roaring flame.
For ammonium, add sodium hydroxide then warm. NH3 is produced which causes damp red litmus to turn blue.
For cations, add sodium hydroxide.
For halides, add dilute nitric acid to react with other ions and then add silver nitrate.
In acid, phenophalin is colourless, in alkaline it is pink.
In acid, methyl orange is red, in alkaline its yellow.
It acid, litmus is red, in alkaline it is blue.

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