A double thistle tube with a porous membrane is held upright with the membrane covered end in a jar of water. When a sugar solution is added to the top of the tube, the liquid will rise in the tube. This apparatus clearly displays the concept of osmosis.
• 1 Battery jar
• 1 Thistle tube with membrane
• 1 Stable support for the thistle tube
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.
California Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.