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Exploring Mixtures: Homogeneous and Heterogeneous Examples

Learn about different types of mixtures, their properties, and methods of separation. Discover homogeneous mixtures like solutions and colloids, and heterogeneous mixtures like suspensions. Explore techniques such as filtration and distillation to separate mixtures effectively.

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Exploring Mixtures: Homogeneous and Heterogeneous Examples

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  1. Types of Mixtures The saga continues….

  2. Mixtures • Combination of more than one pure substance but not bonded chemically • Can be separated physically or chemically! • Salads, Kool-Aid, Pizza.

  3. Types of Mixtures: Homogeneous • “Homogeneous” means: appears the same throughout. • Kool Aid contains water, sugar & coloring, but is not a pure substance because each of the ingredients can vary each time it is made. It is a homogeneous mixture because it is the same throughout and can be separated! • We say they are “miscible” (they dissolve completely).

  4. Types of Mixtures: Heterogeneous • “Heterogeneous” Mixture: Mixtures in which differences can be seen easily…oil & water, sand & water, flour & water.

  5. Mixtures also come in Different Forms • There are THREE Forms of mixtures: • Solutions • Suspensions • Colloids

  6. Solutions • A solution is a mixture that appears to be a single substance, but it is actually composed of 2 or more substances that are distributed evenly amongst each other. • SOLUTIONS ARE HOMOGENEOUS carbon dioxide is dissolved in water sugar & Kool-Aid powder are dissolved in water salt is dissolved in water

  7. Suspensions • A suspension is a mixture in which particles of a material are dispersed throughout a liquid or gas, but are large enough that they settle out. • SUSPENSIONS ARE HETEROGENEOUS Snow globe muddy water Italian dressing

  8. Colloids • A colloid is a mixture in which the particles are dispersed throughout but are not heavy enough to settle out. • COLLOIDS ARE HOMOGENEOUS Colloids have properties of both solutions & suspensions. milk mayonnaise

  9. Separating Mixtures • Substances in a mixture are physically combined, so processes bases on differences in physical properties are used to separate component • Numerous techniques have been developed to separate mixtures to study components

  10. Filtration • Sieving • Dissolving • Centrifuging • Evaporating • Distillation • Magnet

  11. Filtration • Used to separate heterogeneous mixtures composed of solids and liquids • Uses a porous barrier to separate the solid from the liquid • Liquid passes through leaving the solid in the filter paper

  12. Sieving • a porous material is used to separate particles of different sizes. • method is most commonly used to effect gross separations, as of liquids from suspended crystals or other solids.

  13. Dissolving • Used to separate two solids when one is soluble in water and the other is not • Put the solids in a solvent(water) and then use a filter to separate the insoluable solid

  14. Evaporation Evaporation can be used to separate a solute from the solvent in a solution

  15. Distillation • Used to separate homogeneous mixtures • Based on differences in boiling points of substances involved

  16. Centrifugesrotate containers of liquids to separate suspended materials with different densities. • Centrifuges separate different components of human blood or milk and to clarify solutions. A high speed separator can rotate at great speed to separate fat (cream) from milk. • The spin drier in washing machines is a type of centrifuge that throws out the liquid by the "centrifugal force" of the rotation.

  17. A magnet • Can be used to separate a magnetic substance from a non-magnetic substance

  18. What is it? Cheerios

  19. Homogeneous

  20. What is it? Trail Mix

  21. Heterogeneous

  22. What is it? Kool - Aid

  23. Homogeneous

  24. What is it? Italian Salad Dressing

  25. Heterogeneous

  26. Try these……….. Raisin Bran

  27. Orange Juice

  28. Air

  29. Cake Batter

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