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Classifying and Separating Mixtures in Chemistry

Learn how to classify and separate mixtures using techniques like panning, filtration, and distillation. Understand the difference between homogeneous and heterogeneous mixtures, and the concept of phases in mixtures.

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Classifying and Separating Mixtures in Chemistry

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  1. Chemistry2.2

  2. Mixtures 2.2 • Panning is one way to separate gold from a mixture of gold and materials such as sand or gravel. A pan containing the mixture is placed underwater and shaken vigorously from left to right. You will learn how to classify and separate mixtures.

  3. 2.2 Classifying Mixtures • Classifying Mixtures • How can mixtures be classified?

  4. 2.2 Classifying Mixtures • A mixture is a physical blend of two or more components. • Ex: salad, salsa

  5. 2.2 Classifying Mixtures • Mixtures can be classified as • heterogeneous mixtures • homogeneous mixtures

  6. 2.2 Classifying Mixtures • Heterogeneous Mixtures • A mixture in which the composition is not uniform throughout.

  7. 2.2 Classifying Mixtures • Homogeneous Mixtures • A mixture in which the composition is uniform throughout. • Another name for a homogeneous mixture is a solution.

  8. 2.2 Classifying Mixtures • 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.

  9. 2.2 Classifying Mixtures • When oil and vinegar are mixed they form layers, or phases. The oil phase floats on the water phase.

  10. for Conceptual Problem 2.2 Problem Solving 2.10 Solve Problem 10 with the help of an interactive guided tutorial.

  11. 2.2 Separating Mixtures • Separating Mixtures • How can mixtures be separated?

  12. 2.2 Separating Mixtures • Differences in physical properties can be used to separate mixtures.

  13. 2.2 Separating Mixtures • 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.

  14. 2.2 Separating Mixtures • Distillation • During a distillation, a liquid is boiled to produce a vapor that is then condensed into a liquid.

  15. 2.2 Section Quiz. • 2.2.

  16. 2.2 Section Quiz. • 1. Which of the following phrases describes a mixture? • composition varies • composition may vary • components cannot be separated

  17. 2.2 Section Quiz. • 2. Which of the following is a homogeneous mixture? • vinegar • iron filings in sand • chicken noodle soup • muddy water

  18. 2.2 Section Quiz. • 3. Which technique is used to separate homogeneous mixtures? • filtration • distillation • magnetism • dissolving

  19. END OF SHOW

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