Anonymous
Anonymous asked in 教育及參考書小學及中學教育 · 1 decade ago

show the presence of calcium carbonate

Suggest ONE method you would show the presence of calcium carbonate in a sample of construction material.

2 Answers

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  • 1 decade ago
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    calcium carbonate usually refers to lime stone for building materials

    method:

    add acid drops to the material

    if you see bubbles (which would be co2 this case)

    once the process is completed, the material surface would have a dens on where the acid drop were

  • 1 decade ago

    show the ions presence in the sample

    (carbonate) add acid to the sample the gas released turn limewater milky

    (Ca) it will show brick red in the non-luminous fume in flame test

    2007-03-12 20:52:08 補充:

    this method is not reliable because hydrogencarbonate can make the same result.

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