Chemistry tests for anions.

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What is an anion?
An anion is a negatively charged ion.
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What is the test for carbonates?
To test for carbonates add dilute Hydrochloric acid to your test sample.If carbonates(CO32-) are present carbon dioxide will be released,you can test for carbon dioxide with limewater.
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What colour precipitate does sulfate(SO42-) ions produce?
Sulfate ions produces a white precipitate.
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To test for sulfate ion what do you add?
To test for sulfate ion you add dilute Hydrochloric acid and barium chloride solution.
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If there is a white precipitate of the barium sulfate solution what does this mean?
A white precipitate of the barium sulfate solution means the original compound was a sulfate.
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Why do you add Hydrochloric acid to solution?
The Hydrochloric acid is added to get rid of any traces of carbonate or sulfite ions before you do the test. Both of these would also produce a precipitate so they would confuse the results.
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What two substances do you add to test for halides?
To test for halides you add nitric acid(HNO3) followed by silver nitrate solution(AgNO3).
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When you test chloride In this way what colour precipitate does it give off?
When you test chloride in this way it gives a white precipitate called silver chloride.
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When you test bromide in this way what colour precipitate does it give?
Bromide when it is tested like this gives a cream precipitate of silver bromide.
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What anion when tested in this way gives off a yellow precipitate ?
Iodine gives off a yellow precipitate of silver iodine when tested like this.
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Why is nitric acid added before the test to the substance?
The nitric acid is added to get rid of traces of carbonate and sulfite ions before the test.make sure in this test to use nitric acid not Hydrochloric acid.
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What's the test that uses Hydrochloric acid and limewater?
The test for carbonates.
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What's the test that uses nitric acid and silver nitrate solution?
The test for halides.
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What's the test that uses Hydrochloric acid and barium chloride solution?
The test for sulfates.
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Other cards in this set

Card 2

Front

What is the test for carbonates?

Back

To test for carbonates add dilute Hydrochloric acid to your test sample.If carbonates(CO32-) are present carbon dioxide will be released,you can test for carbon dioxide with limewater.

Card 3

Front

What colour precipitate does sulfate(SO42-) ions produce?

Back

Preview of the front of card 3

Card 4

Front

To test for sulfate ion what do you add?

Back

Preview of the front of card 4

Card 5

Front

If there is a white precipitate of the barium sulfate solution what does this mean?

Back

Preview of the front of card 5
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