concentration gradient

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Offline EvilFrog

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concentration gradient
« on: 15/08/2009 02:48:06 »
what caused the water or other substance move down the concentration gradient? Is it a force or others?

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Offline Chemistry4me

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concentration gradient
« Reply #1 on: 15/08/2009 04:27:44 »
No, it just happens because the movement of the particles are all random.

http://www.youtube.com/watch?v=gXJMBgyT_hk&feature=related
http://www.youtube.com/watch?v=sdiJtDRJQEc

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Offline EvilFrog

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concentration gradient
« Reply #2 on: 15/08/2009 04:40:08 »
that mean the particle will move automatically until equilibrium achieved?

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Offline Chemistry4me

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concentration gradient
« Reply #3 on: 15/08/2009 10:14:29 »
I'm not sure what you mean.

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Offline Bored chemist

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concentration gradient
« Reply #4 on: 15/08/2009 18:30:23 »
Given a chance (ie as long as there's nothing stopping them) concentration gradients diaspear.
I guess you could call it automatic- it happens without external intervention.
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Offline Nizzle

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concentration gradient
« Reply #5 on: 18/08/2009 10:01:27 »
It has to do with Brownian motion in water. http://en.wikipedia.org/wiki/Brownian_movement
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