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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

Solutions!

Chapter 7.1

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

heterogeneous mixtures
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!
heterogeneous mixtures1
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)
emulsion a special kind of colloid
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
homogeneous mixtures
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
many states of solutions
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)