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    Moe91's Avatar
    Moe91 Posts: 1, Reputation: 1
    New Member
     
    #1

    Nov 25, 2006, 02:50 PM
    Cellular Bio Question
    A laboratory assistant prepared solutions of 0.8 M, 0.6 M, 0.4 M, and 0.2 M sucrose,
    but forgot to label them. After realizing the error, the assistant randomly labeled the
    flasks containing these four unknown solutions as flask A, flask B, flask C, and flask D.

    Design an experiment, based on the principles of diffusion and osmosis, that the assistant could use to determine which of the flasks contains each of the four unknown solutions.
    Include in your answer (a) a description of how you would set up and perform the
    experiment; (b) the results you would expect from your experiment; and (c) an
    explanation of those results based on the principles involved. (Be sure to clearly
    state the principles addressed in your discussion.)

    Please Help!! :(
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
     
    #2

    Nov 25, 2006, 02:54 PM
    Please refer to This Announcement
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #3

    Nov 25, 2006, 03:55 PM
    Curlyben is such a spoilsport!

    I'll give you some pointers.

    What do your notes tell you about the rate of osmosis through a membrane? What affects the rate? What would happen if you put one of your solutions on one side of the membrane, and another one of your solutions on the other? What would this tell you?

    If you can answer all these questions, an experiment shouldn't be hard to visualise.
    curlyq's Avatar
    curlyq Posts: 1, Reputation: 1
    New Member
     
    #4

    Dec 14, 2006, 10:05 PM
    Experts.about.com/q/Biology-664/AP-Bio.htm
    Maybe this will help

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