Core practical - Identifying compound (AQA GCSE Chemistry): Flashcards

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Core practical - Identifying compound
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How to clean flame test wire loop

Dip it in hydrochloric acid

Part of Bunsen flame to use for flame test

Blue part of the flame

Flame colour of Li+\text{Li}^+ (lithium ion)

Red

Flame colour of Na+\text{Na}^+ (sodium ion)

Yellow

Flame colour of K+\text{K}^+ (potassium ion)

Lilac

Flame colour of Cu2+\text{Cu}^{2+} (copper(II) ion)

Green

Result when carbonate ions tested with limewater

Limewater turns milky

Cl−\text{Cl}^- precipitate colour with silver nitrate

White

Br−\text{Br}^- precipitate colour with silver nitrate

Cream

I−\text{I}^- precipitate colour with silver nitrate

Yellow

Reagent used to test for sulfate ions

Barium chloride solution

Fe2+\text{Fe}^{2+} precipitate colour with NaOH

Green

Fe3+\text{Fe}^{3+} precipitate colour with NaOH

Brown

Al3+\text{Al}^{3+} precipitate behaviour with excess NaOH

White precipitate dissolves in excess

How to treat unknown compounds in this practical

As corrosive and toxic

Explore AQA GCSE Chemistry Revision Notes by Topics

Purity, Formulations & Chromatography

Identification of Common Gases

Methods of Identifying Ions

Explore AQA GCSE Chemistry Model Answers by Topics

Purity, Formulations & Chromatography

Identification of Common Gases

Methods of Identifying Ions

Explore AQA GCSE Chemistry Quizzes by Topics

Purity, Formulations & Chromatography

Identification of Common Gases

Methods of Identifying Ions

Explore AQA GCSE Chemistry Exam Questions by Topics

Purity, Formulations & Chromatography

Identification of Common Gases

Methods of Identifying Ions

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