Unit AS 1 - Basic Concepts in Physical and Inorganic Chemistry
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By: natemcd18 • 1 year ago
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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
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