Karteikarten
AS Level Chemistry Flashcards
Karten in diesem Stapel (29)
- 1Describe Dynamic Equilibrium (2 marks)Rate of forwards reaction equals rate of backwards reaction.
Concentrations are constant. - 2Name (mostly) soluble salts (7 marks)Nitrates, Chlorides, Sulfates, Potassiums, sodiums, ammoniums.
- 3Name the exceptions to Chloride's solubility (2 marks)Silver Chloride, Lead Chloride
- 4Name the exceptions to Sulfate's solubility (4 marks)Barium Sulfate, Lead Sulfate, Strontium Sulfate, Silver Sulfate
- 5Name the exceptions to Nitrate's solubility (1 mark)None, not even Lead Nitrate (Lead being insoluble anywhere else)
- 6Which salt type is generally insoluble, with two exceptions? (3 marks)Carbonates, with exception of group one salts and ammonium salts
- 7If you add sodium hydroxide to an unknown and it goes brown, what does it contain? (1 mark)Iron (III), which becomes Iron (III) Hydroxide
- 8If you add sodium hydroxide to an unknown and it goes dirty green, what does it contain? (1 mark)Iron (II), which becomes Iron (II) Hydroxide
- 9If you add sodium hydroxide to an unknown and it goes blue, what does it contain? (1 mark)Copper (II), which becomes Copper (II) Hydroxide
- 10If you add silver nitrate to an unknown and it goes white, what does it contain? (1 mark)Chloride, which becomes Silver Chloride
- 11If you add silver nitrate to an unknown and it goes cream, what does it contain? (1 mark)Bromide, which becomes Silver Bromide
- 12If you add silver nitrate to an unknown and it goes pale yellow, what does it contain? (1 mark)I
- 13To distinguish between Silver Halides, you can add Ammonia and observe what for each silver halide? (3 marks)Silver Chloride dissolves.
Silver Bromide partially dissolves.
Silver Iodide won't dissolve. - 14Describe the appearance of Halogens at room temperature? (4 marks)Fluorine - pale yellow gas
Chlorine - pale green gas
Bromine - volatile red liquid
Iodine - shiny grey solid, will sublime to a violet (and highly toxic) vapour upon warming - 15Describe the appearance of Halogens in water? (3 marks)Chlorine - pale green
Bromine - orange
Iodine - brown - 16Describe the appearance of Halogens in cyclohexane? (3 marks)Chlorine - pale green
Bromine - orange
Iodine - purple - 17Barium flame test result (1 mark)Apple green
- 18Copper (II) flame test result (1 mark)Blue-green
- 19Lithium flame test result (1 mark)Bright red
- 20Sodium flame test result (1 mark)Yellow
- 21Potassium flame test result (1 mark)Lilac
- 22Calcium flame test result (1 mark)Brick red
- 23Radical Initiation reaction needs? (1 mark)A UV light source
- 24Ozone is formed by adding an O radical to? (1 mark)Oxygen gas, which is diatomic
- 25Why are CFCs dangerous? (3 marks)They catalyse the breakdown of ozone, so it doesn't absorb the harmful UV wavelengths which can cause skin cancer
- 26What does an aromatic compound typically contain? (1 mark)A benzene ring
- 27What does an aliphatic compound typically lack? (1 mark)A benzene ring
- 28If you add neutral Iron (III) Chloride solution to an unknown and a purple colour change is observed, what was present in the unknown?A phenol, or a derivative of a phenol
- 29—
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- Beschreibung
- Covers salt solubility, equilibriums, radical reactions, halides, ion tests, flame tests,
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- Kate Williams
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