Seperating Mixtures

Seperating Mixtures

1. Definitions

   • Compound
     • A compound is a substance where two or more different elements are chemically bonded together.
   • Mixture
     • A mixture is when two or more different  substances mix together, but this is physical and there is no reaction between them.
   • Element
     • An Element is a substance made up of only one type of atom. An Element cannot be chemically broken down into a simpler substance. It is represented by a Symbol eg. Na (Sodium)

2. Filtration

   • The Technique Of Filtration is a way to seperate substances that are insolube in a certain solvent from those that are soluble in that solvent. You filter by using filter paper and pouring your solution through that filter paper. The insoluble substance will remain on the paper

3. Crystallisation

   • Crystallisation is the process of sperating filtrate from a solution eg. water. You can do this by heat it it up and letting it evaporate until only the filtrate is left

4. Chromatography

   • Chromatography is a technique used to seperate and identify substances from mixtures in solutions. This works because some compounds in a mixture dissolve better then others in the chosen solvent. 
   • Technique: A capillary tube is used to dab a spot of the solution on a pencil line near the bottom of the sheet of abs

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