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    sailaja1423's Avatar
    sailaja1423 Posts: 2, Reputation: 1
    New Member

    Jun 10, 2015, 11:47 PM
    10th class biology videos
    To show break down of food by using the model of chalkpiece kept in vinegar?
    joypulv's Avatar
    joypulv Posts: 21,593, Reputation: 2941
    current pert

    Jun 11, 2015, 12:44 AM
    What is your question? If you are looking for a video, search Youtube.
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
    Uber Member

    Jun 11, 2015, 06:59 PM
    Almost any phone today can do that. Chalk is Calcium Carbonate and will react with the acetic acid. It gives off CO2. Otherwise, take a before, during and after picture.

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