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Tests for Positive and Negative Ions (Negative Ions (Carbonate Ions (Add…
Tests for Positive and Negative Ions
positive ions
flame test
calsiuum
Brick red
litheum
Red
strotium
red
copper
green blue
barium
apple green
sodium
yelow
potassium
lilack
Magnesium
No change
NaOH and excess NaOH
copper (II)
Blue precipitate
Douse not desolve
calsum
white persipateate
Douse not desolve
magnesium
white precipitate
douse not dissolve
Aluminum
White precipitate
douse desolve
Iron (II)
green persipatate
turns in to Iron (III)
Iron (III)
Brown precipitate
Douse not dissolve
Negative Ions
Carbonate Ions
Add HCL = Effervesce
CO2 turns lime water couldy
Sulphate Ions
Add diluted BaCL2 (barium chloride)
White precipitate BaSO4 (Barium sulphate) = Sulphate ions present
Halide Ions
Add a little HNO3 to remove OH or CO3 ions
Add a little AgNO3(aq) (silver nitrate solution)
Iodine
Yellow precipitate
Bromine
Cream Precipitate
Chlorine
White precipitate