VCE Chemistry/Unit 3 Area of Study: Analytical Chemistry

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Primary standard

These are substance that are pure enough, that the amount of substance in mole can be calculated accurately from their mass.

It is essential that primary standards

  • be pure
  • have a known molecular formula
  • not react with the atmospheres
  • have a high molar mass
  • be easily obtainable

Suitable Primary standards are

acidic: Hydrated oxalic acid, potassium hydrogen phtalate

basic: Anhydrous Sodium Carbonate, sodium Oxalate