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CM1191 (techniques (chromatography (TLC (visualization (iodine (most…

- - - - visualization
        
        UV lamp
        
        iodine
        
        most organic compounds forming brown spots
        
        except alkyl halides and saturated hydrocarbons
    - - given the same system set up the Rf value will always be the same
        
        solvent used
        
        adsorbent (stationary phase)
  - - - fluted filter paper
        
        ideal 16 folds
      - hot gravity
      - purpose
        
        collect filtrate (solution)
    - - purpose
        
        obtain residue (solids)
  - - - balanced
      - prolong operation generates heat
      - mixture must not be shock sensitive
- - - - super cooling
        
        localized temperature rise
        
        poor maintenance of temperature difference
  - - - Cu+ (aq) is unstable
    - - catalyst in organic reaction
      - very insoluble
  - - - rate=Keff[Aspirin]
        
        pseudo first order
        
        ln[aspirin]t= ln[aspirin]0 +Keff(t)
  - - - corrosive
        
        do not contact with metals
  - - - [solid] solubility increase with increase temp
        
        exception - Na2SO4 and Ce(SO4)3
      - [gas] solubility decrease with increase temperature
    - - le chaterlier principle