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Osmosis experiment using sucrose solution

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									                                                                     http://www.teachnet.ie/mamond
Aim:            To Demonstrate Osmosis
Method:         Water, Sucrose solution, Visking tubing, graduated cylinders
      1. Set up three systems as follows:
A                                  B                              C: CONTROL
20ml sucrose solution              20ml water inside Visking      20ml water inside Visking
inside Visking tubing bag,         tubing bag, placed in          tubing bag, placed in
placed in 100ml water              100ml sucrose sol              100ml water




    100                             100                            100
    ml                              ml                             ml




      2. Leave for some time
      3. Measure the volumes in each system
      4. If you wish to, repeat using salt solution instead of sucrose solution
Results: Fill in tables overleaf
Conclusions
A                                  B                              C
Water moved into the               Water left the Visking         No visible change - both
weak solution in the               tubing to move by              solutions were equal, no
Visking tubing solution by         osmosis to the weak            movement of water
osmosis                            solution outside




                                          110                      100
                                          ml                       ml
          80
          ml



 40ml
                                       10ml                        20ml




                                                   -1-
                                                              http://www.teachnet.ie/mamond

Osmosis experiment using sucrose solution
                   EXP. A                   EXP. B                  C: control
                                            Water inside
                   Strong solution                                  Water inside
                                            Visking tubing
                   inside Visking                                   Visking tubing
Apparatus set up                            “cell”, left in a
                   tubing “cell”, left in                           “cell”, left in a
                                            cylinder of strong
                   a cylinder of water                              cylinder of water
                                            solution
                    Inside     Outside       Inside       Outside    Inside      Outside

Before




After




Loss / Gain




Osmosis experiment using salt solution
                   EXP. A                   EXP. B                  C: control
                                            Water inside
                   Strong solution                                  Water inside
                                            Visking tubing
                   inside Visking                                   Visking tubing
Apparatus set up                            “cell”, left in a
                   tubing “cell”, left in                           “cell”, left in a
                                            cylinder of strong
                   a cylinder of water                              cylinder of water
                                            solution
                    Inside     Outside       Inside       Outside    Inside      Outside

Before




After



Loss / Gain


                                            -2-

								
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