Tests

Tests for positive ions

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Flame Tests

What colour does lithuim give in a flame test?

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Bright Red

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Flame Tests

What colour does sodium give in a flame test?

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Golden yellow

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Flame Tests

What colour does potassium give in a flame test?

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Lilac

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Flame Tests

What colour does calcium give in a flame test?

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Brick red

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Flame Tests

What colour does barium give in a flame test?

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Green

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Positive Ions

What is the test for Aluminium Ions? 

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Add sodium hydroxide and a white precipitate is formed. Aluminium hydroxide dissolves when excess sodium hydroxide is added

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Positive Ions

What is the test for calcium ions?

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Add sodium hydroxide and a white precipitate is formed

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Positive Ions

What is the test for magnesium ions?

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Add sodium hydroxide and a white precipitate is formed

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Positive Ions

What is the test for copper (II)?

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Add sodium hydroxide and copper (II) hydroxide precipitate is blue

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Positive Ions

What is the test for iron (II)

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Add sodium hydroxide and Iron (II) hydroxide precipitate is green and slowly turns brown

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Positive Ions

What is the test for Iron (III)?

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Add sodium hydroxide and iron (III) hydroxide precipitate is reddish brown

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Positive Ions

What is the test for Ammonium ions?

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Ammonium ions react with sodium hydroxide to form ammonia, if the solution is heated the gas given off turns red litmus blue

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Test for Negative Ions

What is the test for carbonate ions?

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Add dilute hydrochloric acid and the gas given off will turn limewater milky

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Test for Negative Ions

What is the test for halide ions?

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Add dilute nitric acid then silver nitrate solution.

Bromide Ions- Cream precipitate

Chloride ions- White precipitate

Iodide Ions- Yellow precipitate


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Test for Negative Ions

What is the test for sulfate ions? 

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Add dilute hydrochloric acid, then barium chloride solution. Gives white precipitate

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Test for Negative Ions

What is the test for nitrate ions?

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Add aluminium powder then sodium hydroxide solution. Warm gently and gas will turn red litmus blue, shows ammonia was produced and nitrate ions were present

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Comments

mustii

really helpful thanks x

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