Identifying Substances Flashcards
What is used it flame tests
Metal ions
What compounds can be recognised by the distinctive colours they produce in the flame test
Lithium sodium potassium calcium and copper compounds
what colour is sodium in the flame test?
Yellow for sodium
If a sample contains a mixture of ions the colours of some areas can be_______
Maskedfor example if solution contains sodium and potassium ions that pale lilac colour from the potassium ions can be hard to the detect alongside the intensity allo from the sodium ions
What is created when a carbonate reacts with dilute
Carbon dioxide gas+salt and water
Most metal carbonates are ________
Insoluble
Sodium carbonate potassium carbonate soluble in dissolve in water to form solutions that contain________
Carbonate ions
What is produced if dilute hydrochloric acid and barium chloride solution added to a solution containing sulfate ions
A white precipitate of barium sulfate is produced
Solutions of halide ions for example chloride bromide and iodide ions react with silver nitrate solution in the presence of dilute nitric acid to produce________
Silver halide precipitates: silver chloride is white
Silver bromide is cream
Silver iodide is yellow
what colour is copper in the flame test?
Green for copper
what colour is calcium in the flame test
Brick red for calcium
What colour is lithium in the flame test?
Crimson red for lithium
What colour is potassium in the flame test?
Lilac for potassium
What is the metal hydroxide precipitate test?
The metal hydroxide precipitate test is a test in which dilute sodium hydroxide solution is used in tests for some metal ions,which form metal hydroxides that are insoluble
what colour does aluminium turn into when mixed with sodium hydroxide?
white
