Chemical Tests
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21 Terms
Hydrogen
squeaky pop with lighted splint
Oxygen
glowing splint relights
Carbon Dioxide
limewater turns cloudy
Ammonia
damp red litmus paper turns blue
Lithium
red flame
Sodium
yellow flame
Potassium
lilac flame
Calcium
orange-red flame
Copper (II)
blue-green flame
Ammonium ions
add sodium hydroxide, test for ammonia gas, damp red litmus paper turns blue
Copper ions
add sodium hydroxide, forms blue precipitate
Iron (II) ions
add sodium hydroxide, forms green precipitate
Iron (III) ions
add sodium hydroxide, forms orange-brown precipitate
Carbonates
add hydrochloric acid, test for carbon dioxide gas, turns limewater cloudy
Sulfates
add hydrochloric acid and barium chloride solution, forms white precipitate
Chloride ions
add nitric acid and silver nitrate solution, forms white precipitate
Bromide ions
add nitric acid and silver nitrate solution, forms cream precipitate
Iodide ions
add nitric acid and silver nitrate solution, forms yellow precipitate
Water
turns white anhydrous copper (II) sulfate blue
Test for Purity of Water
measure freezing or boiling point, if freezes at 0°C and boils at 100°C, pure, if freezes at lower T or boils at higher T, impure
Describe Flame Test
dip nichrome wire in concentrated hydrochloric acid then salt, hold in non-luminous bunsen burner flame