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BELLWORK

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BELLWORK Draw pictures of the three states of matter at the submicroscopic level. Classifying Mixtures A mixture is a physical blend of two or more components. – PowerPoint PPT presentation

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Date added: 23 December 2019
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Title: BELLWORK


1
BELLWORK
  • Draw pictures of the three states of matter at
    the submicroscopic level.

2
Classifying Mixtures
2.2
  • A mixture is a physical blend of two or more
    components.
  • A salad bar provides a range of items. Customers
    choose how much of each item to use in their
    salads. Each salad has a different composition.

3
Classifying Mixtures
2.2
  • Based on the distribution of their components,
    mixtures can be classified as heterogeneous
    mixtures or as homogeneous mixtures.

4
Classifying Mixtures
2.2
  • Heterogeneous Mixtures
  • A mixture in which the composition is not uniform
    throughout is a heterogeneous mixture.
  • Hetero different

5
Classifying Mixtures
2.2
  • Homogeneous Mixtures
  • A mixture in which the composition is uniform
    throughout is a homogeneous mixture.
  • Homo same
  • Another name for a homogeneous
    mixture is a solution.

6
Classifying Mixtures
2.2
  • The term phase is used to describe any part of a
    sample with uniform composition and properties.
  • A homogenous mixture consists of a single phase.
  • A heterogeneous mixture consists of two or more
    phases.

7
Classifying Mixtures
2.2
  • When oil and vinegar are mixed they form layers,
    or phases. The oil phase floats on the water
    phase.

8
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9
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10
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11
Separating Mixtures
2.2
  • How can mixtures be separated?
  • Differences in physical properties can be used to
    separate mixtures.

12
Separating Mixtures
2.2
  • Filtration
  • The process that separates a solid from the
    liquid in a heterogeneous mixture is called
    filtration.
  • A colander is used to separate pasta from the
    water in which it was cooked. This process is a
    type of filtration.

13
Separating Mixtures
2.2
  • Distillation
  • During a distillation, a liquid is boiled to
    produce a vapor that is then condensed into a
    liquid.

14
2.2 Section Quiz.
  • 1.Which of the following phrases describes a
    mixture?
  • composition varies
  • composition may vary
  • components cannot be separated

15
2.2 Section Quiz.
  • 2.Which of the following is a homogeneous
    mixture?
  • vinegar
  • iron filings in sand
  • chicken noodle soup
  • muddy water

16
2.2 Section Quiz.
  • 3. Which technique is used to separate
    homogeneous mixtures?
  • filtration
  • distillation
  • magnetism
  • dissolving

17
8/29 HOMEWORK
  • Read section 2.2 and answer Section Assessment
    11-17
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