Analysing substances aqa C3.4 unit 3 triple science Gcse

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Flashcards by , created over 4 years ago

Flashcards on Analysing substances aqa C3.4 unit 3 triple science Gcse, created by d s on 04/11/2015.

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Created by d s over 4 years ago
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Question Answer
What is the flame colour for potassium? Lilac
What is the flame colour for calcium? Red
What is the flame colour for lithium? Crimson
What is the flame colour for sodium? Yellow
what is the flame colour for Barium? Green
Which ions give a white precipitate when reacted with sodium hydroxide? Aluminium, calcium, magnesium
Which of the previous ion re-dissolves in excess sodium hydroxide? Aluminium
What is the colour of copper's precipitate? Blue
What clour is Fe(II)'s precipitate? Green
What colour is Fe(III)'s precipitate? Brown
How do we test for halide ions? Add Silver nitrate solution with nitric acid.
What colour is a chloride precipitation? White
What colour is a bromide precipitation? Cream
What colour is an iodide precipitation? Yellow
What is the test for sulphate ions? add barium chloride and dilute hydrochloric acid (white precipitation in the presence of sulphate ions)