Qualitative Tests
Tests for gases
CO2 Pass through limewater Limewater changes from
colourless to milky
H2 Burning splint into a sample Burns with a pop
of gas
02 Glowing splint into a sample Splint relights
of gas
Cl2 Damp litmus or universal Bleaches
indicator paper
NH3 - Damp universal - Turns blue
indicator paper - Dense white fumes
- Glass rod dipped in
concentrated HCL
HCl - Damp universal - Turns red
indicator paper - Dense white fumes
- Glass rod dipped in
concentrated NH3
Flame Tests
Crimson Lithium
Yellow Sodium
Lilac (pink through cobalt glass) Potassium
Brick red Calcium
Apple green Barium
Blue-green Copper
Halide Ions
Dissolve a spatula measure White ppt. which is soluble Chloride ion present
of the solid sample in dilute in both conc and dilute
nitric acid and add a few ammonia
cm3 of silver nitrate sol.
Add dilute/conc ammonia
sol.
Cream ppt which is soluble Bromide ion present
in conc. ammonia
Yellow ppt not soluble Iodide ion present
Sulfate ion and Carbonate ion
Tests for gases
CO2 Pass through limewater Limewater changes from
colourless to milky
H2 Burning splint into a sample Burns with a pop
of gas
02 Glowing splint into a sample Splint relights
of gas
Cl2 Damp litmus or universal Bleaches
indicator paper
NH3 - Damp universal - Turns blue
indicator paper - Dense white fumes
- Glass rod dipped in
concentrated HCL
HCl - Damp universal - Turns red
indicator paper - Dense white fumes
- Glass rod dipped in
concentrated NH3
Flame Tests
Crimson Lithium
Yellow Sodium
Lilac (pink through cobalt glass) Potassium
Brick red Calcium
Apple green Barium
Blue-green Copper
Halide Ions
Dissolve a spatula measure White ppt. which is soluble Chloride ion present
of the solid sample in dilute in both conc and dilute
nitric acid and add a few ammonia
cm3 of silver nitrate sol.
Add dilute/conc ammonia
sol.
Cream ppt which is soluble Bromide ion present
in conc. ammonia
Yellow ppt not soluble Iodide ion present
Sulfate ion and Carbonate ion
