Osmometer results

The visking tubing has been filled with concentrated sugar solution (coloured with green food dye), and the beaker on the outside contains only water.
photo of visking osmometer at start of experiment

This picture show the situation near to the start. Note the level of the green liquid.
photo of visking osmometer in middle of experiment

This picture shows that the liquid level has risen, showing that osmotic pressure is responsible.
photo of visking osmometer at end of experiment

Only about an hour later, the liquid level has risen so high that it has overflowed, and the green colour can now be seen in the bottom of the beaker.
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