Tests Flashcards
Sodium hydroxide in aluminium
White precipitate, dissolves in excess forming a colourless solution
Sodium hydroxide in ammonium
Ammonia gas given of on warming, turns damp litmus paper blue
Sodium hydroxide in calcium
White precipitate, insoluble in excess
Sodium hydroxide in copper
Light blue precipitate, insoluble in excess
Sodium hydroxide in iron 2+
Green precipitate, insoluble in excess
Sodium hydroxide in iron 3+
Brown precipitate, insoluble in excess
Sodium hydroxide in zinc
White precipitate, dissolves in excess forming a colourless solution
Aqueous ammonia in aluminium
White precipitate, insoluble in excess
Aqueous ammonia in ammonium
none
Aqueous ammonia in calcium
No precipitate or very faint white precipitate
Aqueous ammonia in copper
light blue precipitate, dissolves in excess to give a deep blue solution
Aqueous ammonia in iron 2+
Green precipitate, insoluble in excess
Aqueous ammonia in iron 3+
Brown precipitate, insoluble in excess
Aqueous ammonia in zinc
White precipitate, dissolves in excess forming a colourless solution
Test for carbonate
add dilute hydrochloric acid
Result for carbonate
Effervescence, carbon dioxide is given off, limewater goes milky
Test for chloride
Add excess dilute nitric acid and then aqueous silver nitrate
Test for iodide
Add excess dilute nitric acid and then aqueous silver nitrate
Test for nitrate
Warm with aqueous sodium hydroxide and aluminium foil
Result for chloride
White precipitate
Result for iodide
Yellow precipitate
Result for nitrate
Ammonia given off, pungent smell, turns red litmus paper blue
Test for sulphate
Add excess hydrochloric acid and barium sulphate
result for sulphate
White precipitate
test for ammonia
Turns damp red litmus paper blue
Test for carbon dioxide
Turns limewater milky
Test for chlorine
Bleaches damp litmus paper
Test for hydrogen
Gives a pop sound in an ignited splint
Test for oxygen
Relights a glowing splint
Flame test for lithium
Crimson
Flame test for sodium
Yellow
Flame test for ptassium
Lilac
Flame test for calcium
Orange red
Flame test for copper
green