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3.2: Practice Classifying Matter

  • Page ID
    235913
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    Exercise \(\PageIndex{1}\)

    Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

    a)  liquid hand soap (transparent, not creamy)

    b)  carbonated water (fizzing, not flat)

    c)  ascorbic acid (also known as vitamin C, C6H8O6)

    Answer a

    homogeneous mixture (has water, various soap molecules, possibly antimicrobial agents)

    Answer b

    heterogenous mixture (CO2 gas bubbles are distinct phase, not uniformly mixed)

    Answer c

    compound (has chemical formula)

    Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

    d)  isopropanol (C3H8O)

    e)  a bottle of 70% isopropanol

    f)  sulfur

    Answer d

    compound

    Answer e

    homogeneous mixture (has 70% isopropanol, 30% water)

    Answer f

    element

    Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

    g)  bronze (metal alloy of copper and tin)

    h)  silver

    i)  oxygen gas (O2)

    Answer g

    homogeneous mixture

    Answer h

    element

    Answer i

    element (some elements exist in nature as diatomic molecules)


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