Mixtures and Chromotography

• What is a mixture?


  A combination of two or more substances that are not chemically bonded.
• Parts of a mixture can be either elements or compounds.
• How can mixtures be separated?

  Filtration, distillation, chromatography.
• What is crude oil a mixture of?


  Hydrocarbons
• Properties of a mixture are just a mixture of the properties of each separate element or compound in it, unlike a compound.
• How would you conduct a chromatography practical?


  Stationary phase, mobile phase, sample application, development, visualization.
• Why do you use pencil and not pen for your start line in chromotography?


  Pencil doesn't dissolve in the solvent used in chromatography.
• The further up the paper the solvents move, the less attracted to the paper they are.
• The further up the paper the solvents move, the less attracted to the paper they are.