pagina 502 Hulandes

 
       
 


 

     página 502 Papiamentu

                                                papierchromatografie, practicum
                                   
                           

                                    benodigdheden:    Een filtreerpapier met geprinte punten
                                                              Twee stukken filtreerpapier (zonder opdruk)
                                                              Een stuk normaal papier
                                                              2 stiften
                                                              4 wegwerpbekers
                                                              2 rietjes
                                                              water
                                                              20 ml wasbenzine
                                                              maatcilinder
                                                              plakband

                                                           
                                    uitvoering:      

                                    1                     Markeer met potlood een horizontaal streepje zoals aangegeven in de afbeelding hieronder.

                                                       


                                                            Knip het fitreerpapier zodanig dat het papier de onderstaande afmetingen heeft.

                                                                    


                                                                  Bevestig een 9 cm lang rietje aan het papier. Gebruik hiervoor plakband.
                                                                  Zie de onderstaande tekening.


                                                                            

                                                             Vul de beker met 20 ml water.
                                                             Hang het papier in de beker. 

                                                              
                   

                                    2             Herhaal de gehele procedure met filtreerpapier en gewoon papier.
                                                   Zet op de plaats van de stippen een punt met een stift.

                                    3             Herhaal de gehele procedure met filtreerpapier. gebruik nu een ander oplosmiddel: 20 ml wasbenzine.

                                    4             Wacht ongeveer 25 minuten. Noteer je waarnemingen.

                                    waarnemingen:
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                                    conclusie:
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                                    conclusie, vergelijking water en wasbenzine als oplosmiddel:
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