OCR C7 analysis, chromatography and titrations

OCR C7 analysis, chromatography and titrations

1. analytical procedures

   • know the difference between qualitative and quantitative
     • be familiar with how samples are analysed in the lab

2. chromatography

   • what is it?
     • mobile phase
     • stationary phase
   • aqueous and non aqueous solvents
   • how does it work (dynamic equilibrium)
   • how does it separate?
   • using a reference database of materials
   • compare paper and thin layer chromatography
     • calculate RF value
       • locating agents
   • gas chromatography
     • how it works
     • retention time
     • interpret results

3. titrations

   • steps by step procedure
     • measure accurately sample volume
       • dissolving if needed
         • measuring colour change/ volume needed
   • concentration is grams per dm3
   • how to make a standard solution
     • work out concentration from titration results
   • degree of uncertainty in results