purity and formulations

• What does it mean when something is 'pure' in chemistry?

  Only contains one compound or element throughout and is not mixed up with anything else.
• The boiling point and melting point can tell you what about a substance?


  How pure a substance is
• You can test the purity of a substance by measuring it's melting or boiling point and compare it to a pure substance's.
• Impurities will lower the boiling point of a substance and increase the melting range.
• Impurities in substances can increase the boiling point and result the in the sample boiling at a range of temperatures.
• Formulations are mixtures with exact amounts of components.
• Formulations are useful mixtures with precise purposes that are made by a formula.
• What is pigment?

  gives colour to paint
• What is solvent?

  Used to dissolve other components in paint and alter viscosity.
• What is binder (resin)?


  Forms a film that holds pigment in place after it's painted on.
• What are additives?

  Added to further change the physical and chemical properties of paint.
• Formulations are important for:

  pharmaceutical industry

  cleaning products

  fuels

  fertilisers
• How can changing formulation of a pill affect?

  shelf life

  what part of the body it delivers it to

  if it can be consumed
• The information on the back of a product is it's formulation.