Please enable JavaScript.

Coggle requires JavaScript to display documents.

Chemistry Revision - Coggle Diagram

- - - - Chlorine has a characteristic sharp, choking smell. It also makes damp blue litmus paper turn red, and then bleaches it white.
    - - A lighted wooden splint makes a popping sound in a test tube of hydrogen.
    - - Carbon dioxide turns limewater milky. A lighted wooden splint goes out in a test tube of carbon dioxide but this happens with other gases, too. So the limewater test is a better choice
    - - A glowing wooden splint relights in a test tube of oxygen.
  - - - Crimson
    - - Lilac
    - - Yellow
    - - Cyan
    - - Brick red
  - - - White-White
    - - Palue Blue- Pale Blue
    - - White-White
    - - Green-Grey/green
    - - White-dissolves
    - - Brown-Rusty
  - - - 1.draw a pencil line across the chromatography paper, 1 - 2 cm from the bottom
      - use a pipette or capillary tube to add small spots of each ink to the line on the paper
      - place the paper into a container with a suitable solvent in the bottom
      - allow the solvent to move through the paper, but remove the chromatogram before it reaches the top
      - allow the chromatogram to dry, then measure the distance travelled by each spot and by the solvent
- - - - Metals
        
        Good conductor of electricity
        
        Good conductor of heat
        
        Shiny
        
        High density
        
        Malleable
        
        Ductile
      - Non-Metals
        
        Poor conductor of electricity
        
        Poor conductor of heat
        
        Dull
        
        Low density
        
        Brittle
- - - - Carbon dioxide is a very soluble gas. It dissolves readily in water. As the oceans formed, carbon dioxide dissolved to form soluble carbonate compounds so the amount in the atmosphere decreased. Carbonate compounds were then precipitated as sedimentary rocks, eg limestone.
        Carbon dioxide was also absorbed from the oceans when the first plants and algae carried out photosynthesis. Many of these organisms, and those in the food chains that they supported were turned into fossil fuels, eg crude oil, coal and natural gas, which all contain carbon.