Tests for cations (AQA GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What are cations?
What are cations?
Positive ions
What colour flame does sodium produce in a flame test?
What colour flame does sodium produce in a flame test?
Bright yellow
Which metal ion produces a lilac flame in a flame test?
Which metal ion produces a lilac flame in a flame test?
Potassium
What colour flame does copper produce?
What colour flame does copper produce?
Green
What colour flame does calcium produce in a flame test?
What colour flame does calcium produce in a flame test?
Orange-red
How do you know the flame test wire loop is properly cleaned?
How do you know the flame test wire loop is properly cleaned?
It shows no colour in flame
What colour precipitate do copper(II) ions form with sodium hydroxide?
What colour precipitate do copper(II) ions form with sodium hydroxide?
Blue
What colour precipitate do iron(II) ions form with sodium hydroxide?
What colour precipitate do iron(II) ions form with sodium hydroxide?
Green
What colour precipitate do iron(III) ions form with sodium hydroxide?
What colour precipitate do iron(III) ions form with sodium hydroxide?
Brown
Which metal ions form white precipitates with sodium hydroxide?
Which metal ions form white precipitates with sodium hydroxide?
, ,
What happens to aluminium hydroxide precipitate in excess sodium hydroxide?
What happens to aluminium hydroxide precipitate in excess sodium hydroxide?
It dissolves
Can you distinguish magnesium and calcium ions using only the hydroxide test?
Can you distinguish magnesium and calcium ions using only the hydroxide test?
No, both form white precipitates
Why do copper and iron form coloured precipitates?
Why do copper and iron form coloured precipitates?
They are transition metals