Osmosis Basic Experiments Have Never Been Clearer.
This easy-to-use set includes battery jar
41cm glass double thistle tube with metal support
Membrane and O-ring
Water diffuses through the porous membrane at the bottom of the double thistle tube when it is immersed in the water filled battery jar. The diffusion stops when the levels are equal inside and out. Then see the water rise in the tube as a sugar solution is added.
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