Osmosis Experiment

Video of classic demonstration of osmotic pressure using thistle tube and sugar solution. Part way through, the liquid in the tube rises out of view -- but we spotted it and repositioned the camera. At the very end, the membrane springs a leak and the column of water goes back down.

Here's a secret. My daughter and I made this video so she would not have to monitor the thing and record all the details in her lab notebook.

Category:

Science & Technology

Tags:

• osmosis
• demonstration
• experiment
• biology
• science
• diy
• environment
• diffusion
• investigation

[FuzzyFilmltd]

If the top part (up in the air) had a membrane of some kind that would allow the water (not the solute) out, and the water dripped back down into the container, the process would start over again. It would be a perpetual motion system, a self-propelled fountain.

I either just said something stupid or solved world energy problems.

[SaltySky]

@FuzzyFilmltd

That's fine Fuzzy. Go on and solve the world's troubles but remember I get a piece of the action.

[IsRens]

Just wondering who composed the piano piece? The name of the instrumental if you wouldn't mind.

[SaltySky]

@IsRens Thanks for asking but I actually don't know. It was a tune I picked from a list that YouTube provides. I don't remember and can't find it again.

[PS3523]

what type of starch?

[SaltySky]

Actually, it was a sugar solution. Regular table sugar.

[St8Solja]

how does this work?

[RanmaAnime]

In this experiment they used thistle tube and sugar solution, same concept.

[FuzzyFilmltd]

@SaltySky Darn it, somebody who was born before me already has companies planning osmotic powerplants.

Good for energy crisis, bad for me.

[josephdupont]

what is the membrane? 

[valllhalla]

Very nice! now if you have a fresh water river, that flows out in to the ocean. Then you can make a power station with exploiting this technology. Just think

[Qhoove]

thats more of capillary action and adhesion/cohesion?

[lovemenotyou18]

ahhh.........gve us some procedure pllz........form ur egg osmosis..