Submitted by Sea_Guide7219 t3_126dz7v in askscience
antiquemule t1_jearmhj wrote
Just to add a bit of detail to the correct answers already posted:
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Yes, chemical force is a valid concept. See chemical potential in Wikipedia.
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Osmotic pressure does not have to involve circulation of solvent, any more than air pressure has to involve flow of air.
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The explanations are correct. They are not even a simplification.
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