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I. Types of Mixtures p. 476 479

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I. Types of Mixtures p. 476 479

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    1. I. Types of Mixtures (p. 476 – 479) Ch. 15 – Mixtures & Solutions

    2. A. Definitions Mixture = Variable combination of 2 or more pure substances Homogeneous = uniform composition throughout Heterogeneous = variable composition

    3. A. Definitions Solution – homogeneous mixture

    4. B. Mixtures Gases can also mix with liquids Gases are usually dissolved in water Examples are carbonated drinks Homogeneous mixtures (solutions) Contain sugar, flavorings and carbon dioxide dissolved in water

    5. B. Mixtures Solution homogeneous very small particles – avg diameter usually less than 2 nm (10-9 m) no Tyndall effect particles don’t settle Ex: rubbing alcohol

    6. B. Mixtures Colloid heterogeneous medium-sized particles, usually between 2 nm and 1000 nm Tyndall effect particles don’t settle Ex: milk

    7. B. Mixtures Suspension Heterogeneous large particles usually > 1000nm particles settle Tyndall effect Ex: fresh-squeezed lemonade

    8. B. Mixtures Examples: mayonnaise muddy water fog saltwater Italian salad dressing

    9. Mixtures Mini-Lab Have fun! 20 minutes…

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