mixtures

• What are mixtures composed of?

  Two or more elements or compounds
• How are mixtures different from compounds?

  Mixtures have no chemical bonds between parts
• Which physical methods can separate mixtures?

  Filtration, crystallisation, distillation, chromatography
• What is air primarily composed of?

  Nitrogen, oxygen, carbon dioxide, argon
• Why can the gases in air be easily separated?

  They are not chemically bonded
• What is crude oil a mixture of?

  Different length hydrocarbon molecules
• How do the properties of a mixture relate to its components?

  Properties are a mix of the separate parts
• What happens to the chemical properties of substances in a mixture?

  They remain unchanged
• What can be observed in a mixture of iron powder and sulfur powder?

  It shows properties of both iron and sulfur
• What are the key characteristics of mixtures?

  • Composed of two or more elements or compounds
  • No chemical bonds between components
  • Can be separated by physical methods
  • Properties reflect those of individual components
• What are some physical methods to separate mixtures?

  1. Filtration
  2. Crystallisation
  3. Simple distillation
  4. Fractional distillation
  5. Chromatography