Osmosis Demonstration
by Trevor Clifford Photography
Title
Osmosis Demonstration
Artist
Trevor Clifford Photography
Medium
Photograph - Photograph
Description
Osmosis demonstration. Apparatus used to demonstrate the movement of molecules through osmosis. Here, Visking tubing containing a strong sugar solution coloured with food dye has been attached to a clear capillary tube (top) and submerged in a beaker of water. Osmosis is the net movement of solvent molecules across a semi-permeable membrane in a direction that equalises the solute concentrations on either side. As the sugar solution is more concentrated, water passes into the tubing. This causes an increase in the volume of liquid in the tubing, increasing the pressure and forcing the coloured solution up the capillary tube.
Uploaded
June 29th, 2016
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