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Solutions!

Solutions! . Chapter 7.1 . Objectives!. Discuss heterogeneous and homogeneous mixtures Discuss the types and different properties of solutions Identify real mixtures based on their properties (lab) . Mixtures. Heterogeneous Mixtures—composed of different types of phases of substances

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Solutions!

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  1. Solutions! Chapter 7.1

  2. Objectives! • Discuss heterogeneous and homogeneous mixtures • Discuss the types and different properties of solutions • Identify real mixtures based on their properties (lab)

  3. Mixtures • Heterogeneous Mixtures—composed of different types of phases of substances - ex: Fruit salad Granite • Homogeneous Mixtures—the same throughout (substances have dissolved in one another) - ex: Salt water Alloys (metal mixtures)

  4. Heterogeneous Mixtures • Suspensions • Particles appear to be more or less evenly distributed, but particles will separate out when the suspension sits • Particles can then be filtered out • Ex: Orange juice!

  5. Heterogeneous Mixtures • Colloids • Particles are smaller than particles in a suspension • When you shine a light through them, they scatter light! –Tyndall Effect • (So the mixture is not the same throughout) • Ex: Jello, Egg Whites, Blood Plasma, Whipped Cream (Dispersing gas in a liquid), Marshmellows (Gas in a solid)

  6. Emulsion—a special kind of colloid • Emulsion: A mixture of two or more immiscible liquids in which one liquid is dispersed in the other • (Immiscible—liquids that usually do not mix!) • Ex: Cream (made of oily fat in water, with proteins) • Emulsifier—protein that keeps the lipids (fats) dispersed in each other

  7. Homogeneous Mixtures • Solutions—homogeneous mixture of two or more substances that are uniformly dispersed throughout a single phase • One substance dissolves into the other • Solute—substance that is dissolved • Solvent—substance that solute is dissolved into

  8. Many States of Solutions • Solid-liquid solution • Sugar in water • Liquid-liquid solution • Gasoline • Alloy  a solid or liquid mixture of two or more metals • Solid-solid  Bronze (tin + copper)

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