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18 Cards in this Set
- Front
- Back
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What is the test for hydrogen gas? |
Gives a pop with a lit splint |
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What is the test for oxygen gas? |
it relights a glowing splint |
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What is the test for carbon dioxide? |
It turns lime water cloudy white. |
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What is the test for chlorine gas? |
It turns damp blue litmus paper red then white. |
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What is the test for ammonia gas? |
It turns damp red litmus paper blue, |
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How would you test a liquid was water? |
Anhydrous copper sulfate goes from white to blue. or Cobalt chloride paper goes from blue to pink. |
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What is the test for a carbonate? |
Add any dilute acid and effervescence is observed. The gas can be tested to prove it is carbon dioxide. |
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What is the test for chloride ions? |
Add dilute nitric acid followed by silver nitrate solution. Positive result: A white precipitate is observed - silver chloride. |
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What is the test for sulfate ions? |
Add dilute nitric acid followed by barium nitrate solution (or barium chloride solution). Positive result: A white precipitate is formed - barium sulfate. |
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What is the test for nitrate ions? |
Add sodium hydroxide solution and aluminium powder or foil. Warm gently. Positive result: Ammonia gas is produced that is tested using damp red litmus paper. |
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What is the result of adding a few drops of sodium hydroxide solution followed by an excess, to a solution containing copper (II) ions? |
A light blue precipitate forms - Cu(OH)2. The precipitate is insoluble in excess sodium hydroxide. |
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What is the result of adding a few drops of sodium hydroxide solution followed by an excess, to a solution containing Iron (II) ions?
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A green precipitate forms Fe(OH)2. This precipitate does not dissolve in excess sodium hydroxide, but it does oxidize on standing to produce brown iron(III) hydroxide. |
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What is the result of adding a few drops of sodium hydroxide solution followed by an excess, to a solution containing Zinc (II) ions?
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A white precipitate is formed - Zn(OH)2. This precipitate dissolves in excess sodium hydroxide solution to give a colourless solution. |
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What is the result of adding a few drops of sodium hydroxide solution followed by an excess, to a solution containing Iron (III) ions?
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A brown precipitate forms - Fe(OH)3.The precipitate is insoluble in excess sodium hydroxide.
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What is the result of adding a few drops of ammonia solution followed by an excess, to a solution containing Iron (III) ions?
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A brown precipitate forms - Fe(OH)3.The precipitate is insoluble in excess ammonia solution. |
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What is the result of adding a few drops of ammonia solution followed by an excess, to a solution containing Iron (II) ions?
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A green precipitate forms Fe(OH)2.This precipitate does not dissolve in excess ammonia, but it does oxidize on standing to produce brown iron(III) hydroxide.
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What is the result of adding a few drops of ammonia solution followed by an excess, to a solution containing Zinc (II) ions?
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A white precipitate is formed - Zn(OH)2.This precipitate dissolves in excess ammonia solution to give a colourless solution.
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What is the result of adding a few drops of ammonia solution followed by an excess, to a solution containing copper (II) ions?
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A light blue precipitate forms - Cu(OH)2.The precipitate dissolves in excess ammonai solution to give a royal blue solution.
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