Mixtures

• Mixtures


  Lots of separate things all mixed together
• Mixtures are Easily Separated-Not Like Compounds
• Mixtures


  • Contain at least two different elements or compounds
  • There aren't any chemical bonds between the different parts of a mixture
• Mixtures


  • Air (a mixture of gases, mainly nitrogen, oxygen, carbon dioxide and argon)
  • Crude oil (a mixture of different length hydrocarbon molecules)
• Methods to separate mixtures


  1. Filtration

  2. Crystallisation

  3. Simple distillation

  4. Fractional distillation

  5. Chromatography
• The methods to separate mixtures are all physical methods
• This means they don't involve any chemical reactions, and don't form any new substances
• Properties of a mixture


  • Just a mixture of the properties of the separate parts
  • The chemical properties of a substance aren't changed by it being part of a mixture
• Mixture of iron powder and sulfur powder


  • Will show the properties of both iron and sulfur
  • Will contain grey magnetic bits of iron and bright yellow bits of sulfur