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Thread: i have one silly doubt

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    Within my grasp! dussamkumar's Avatar
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    i have one silly doubt

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    what is osmosis?
    transporting from higher conc to lower conc
    transporting from lower conc to higher conc


    plz clarify my doubt. because in various sources it is different.

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    Eager!
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    osmosis - from higher concentration to lower concentration across partially permeable membrane. applies to water.

    active transport - from lower to higher concentration. energy is utilised during the process.

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    Within my grasp! dussamkumar's Avatar
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    thanks hamsternutz for early reply.
    all the best.
    kumar

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    Within my grasp! Pharm8's Avatar
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    Transport of the Molecules from its higher concn to its lower concn through semipermeable membrane untill equilibrium is reached.

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    In osmoses only the solvent can move thrugh a semipermeable membrane from low solute conc to high solute conc
    Knowledge is Power

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    Within my grasp! colu's Avatar
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    hi cheeryfda,
    hamsternutz is right. osmosis is from higer con. to lower con. and applies only to the water.

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    An Urch Guru Pundit Swami Sage
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    Quote Originally Posted by colu View Post
    hi cheeryfda,
    hamsternutz is right. osmosis is from higer con. to lower con. and applies only to the water.

    COLU,
    this time you are wrong Cherry is right , type osmosis in wikepedia or just look into it in cha3 CPR cheryy is right . from DILUTED medium to CONCENTRETED medium.
    colu you are tolking about diffusion maybe

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    Within my grasp! colu's Avatar
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    hey khadija,
    you are right. and thanks for advicing me.

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    hey guys dont get confused....as khadija said.try to go to this website and see....

    1)http://en.wikipedia.org/wiki/Osmosis

    transporting from lower conc to higher conc thru selective permeable membrane....----osmosis

    2)http://en.wikipedia.org/wiki/Diffusion

    transporting from higher conc to lower conc----diffusion....
    BE LIKE A PEARL....PRECIOUS AND RARE,NOT LIKE A STONE FOUND EVERYWHERE.......

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    Thanks for correcting me also.

    dussamkumar, i think after all this discussion i understand why you said that the definition of osmosis varies from one source to another.

    Here, i think it is important to note that when one is saying that osmosis is "transporting from lower conc to higher conc", it is with respect to the concentration of the solute.

    I think that is why you were confused. Some put it the way I put: higher to lower and some put it as: lower to higher but with respect to solute concentration.

    A diluted solution (in other words, a solution with low solute concentration) will have high water potential, while a concentrated solution (high solute concentration in given volume of water) has a lower water potential - so water will move from a diluted solution to a concentrated solution across a partially permeable membrane. Hence the definition "from lower to higher"

    The definition cherryfda gave is perfectly correct

    In addition, one of the best ways to understand both definitions (not explain them) is that ulimately the movement of the solvent takes place down the concentration gradient.

    The query that now arises in my mind is "is osmosis only for water or for ALL solvents?"
    Last edited by hamsternutz; 11-29-2006 at 07:21 PM.

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