purity and separating mixtures c2.1

  • Created by: faiqa1331
  • Created on: 06-10-18 21:52
View mindmap
  • purity and separating mixtures (c2.1)
    • separating mixtures (c2.1.4 + c2.1.5 + c2.1.6)
      • filtration
        • separates a solid from a liquid
        • insoluble substances forms residue
        • soluble substances goes through filter paper
      • crystallisation
        • produces dry sample of soluble substance
        • solution is heated
        • solvent is evaporated
      • simple distillation
        • separates a solvent from a solution
        • evaporation then cooling then condensing
      • fractional distillation
        • separates a liquid from a mixture of liquids
        • evaporation then cooling at different temperatures then condensing
      • chromotography
        • stationary phase
        • mobile phase
        • substances disturbed between phases
        • rf = distance travelled by substance / distance travelled by solvent
    • formulae (c2.1.1 + c2.1.2)
      • relative formula mass (mr)
      • empirical formula
      • relative atomic mass (ar)
    • pure and impure (c2.1.3)
      • pure substance
        • contains one element or compound
        • single sharp melting point
      • impure substance
        • melts over a range of temperatures

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Atoms and compounds resources »