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Thread: Physical separation

  1. #1
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    Question Physical separation

    Hi everyone,
    Is it possible to separate CaCO3 from sand using only physical methods?
    It seems tricky to me.

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    Junior Member OkDen's Avatar
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    Re: Physical separation

    The only way I can think of is:

    - Dissolve CaCO3 in a dilute acid (Since CaCO3 is insoluble to water.) (This is a chemical change. So, it's irreversible)
    - Then filter out the sand.
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  3. #3
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    Re: Physical separation

    That works. But no acids were allowed.

    My teacher gave me a difficult mixture... lol

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    Re: Physical separation

    CaCO3 and sand have different melting points. So you could possibly use that (I think), but it certainly wouldn't be doable in a classroom lab.
    Last edited by fan96; 10 Feb 2018 at 11:38 PM.
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