Experimental techniques

Experimental techniques

1. Purity

   • chromatography
     • describe paper chromatography
     • interpret simple chromatograms
     • 'locating agents' used to position colourless substances on chromatograms
   • substance identified from their specific mp/ bp
   • purity is important in everyday life (e.g. food and drugs)
   • methods of purification
     • filtration
     • crystalisation
     • simple distillation
       • distillation of alcohol from fermentation
     • fractionational distillation
       • crude oil refining
     • KNOW HOW TO PURIFY A SUBSTANCE (USING THESE METHODS)

2. Rusting Exp.

3. Copper Sulphate

   • anhydrous & hydrous (blue and pink)

4. Flame Test

5. +ive -ive ion test

6. gas test (o2, co2, h2, cl2)