Separating Techniques

Karen Bugeja
Mind Map by Karen Bugeja, updated more than 1 year ago
Karen Bugeja
Created by Karen Bugeja over 6 years ago
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Form 2 Integrated Science (Chemistry) Mind Map on Separating Techniques, created by Karen Bugeja on 06/18/2015.

Resource summary

Separating Techniques
  1. Distillation
    1. Method: set up apparatus as shown in diagram. Flask should be less than half full. Place an empty tube or beaker to collect distillate. Support this tube in test tube rack. Heat flask of solution using a bunsen burner. Collect a half tube of distillate.
      1. Diagram see pg 67
      2. Chromatography
        1. Separate colours
          1. Method and diagram Pg 75
        2. Filtration
          1. You need to have an insoluble material which can be filtered
            1. Place the mixture bit by bit in the folded filter paper which is supported by the funnel. Collect the filtrate in a beaker or test tube once it passes through the filter paper. The residue will remain in the folded filter paper
          2. Evaporation
            1. When something has dissolved, the liquid needs to be evaporated to separate them
              1. The more fine the soluble substance e.g. sugar is, the quicker it dissolves
                1. The hotter the temperature the more the soluble substance dissolves
                  1. Liquids such as water evaporate (liquid to gas) to leave compounds which cannot evaporate. E.g. water evaporates leaving calcium carbonate, thus petrifying an absorbent material
                  2. Heating until the liquid has evaporated and the soluble substance is left
                  3. Solvents
                    1. Dissolves a certain substance e.g. alcohol is a solvent (dissolves) ballpoint pen ink
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