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So l ut i ons

So l ut i ons. Heterogeneous Mixtures. A heterogeneous mixture is a mixture that does not have a uniform composition and in which the individual substances remain distinct. Section 14-1. Suspensions and Colloids. Suspensions and colloids are NOT solutions. .

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So l ut i ons

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  1. Solutions

  2. Heterogeneous Mixtures • A heterogeneous mixture is a mixture that does not have a uniform composition and in which the individual substances remain distinct. Section 14-1

  3. Suspensions and Colloids Suspensions and colloids are NOT solutions. Suspensions: The particles are so large that they settle out of the solvent if not constantly stirred. Colloids: The particles intermediate in size between those of a suspension and those of a solution.

  4. Heterogeneous Mixtures (cont.) • Colloids are heterogeneous mixtures of intermediate sized particles (between 1 nm and 1000 nm) and do not settle out. • The most abundant substance in a mixture is the dispersion medium. • Colloids are categorized according to the phases of their particles. Section 14-1

  5. Types of Colloids

  6. Heterogeneous Mixtures (cont.) • Brownian motion is the jerky, random movements of particles in a liquid colloid, from the results of particle collisions. • The Tyndall effectis when dispersed colloid particles scatter light. Section 14-1

  7. The Tyndall Effect Colloids scatter light, making a beam visible. Solutions do not scatter light. Which glass containsa colloid? solution colloid

  8. Homogeneous Mixtures • Solutions are homogeneous mixtures that contain two or more substances called the solute and solvent. • Most solutions are liquids, but gaseous and solid solutions exist. Section 14-1

  9. Homogeneous Mixtures (cont.) Section 14-1

  10. Homogeneous Mixtures (cont.) • A substance that dissolves in a solvent is soluble. • Two liquids that are soluble in each other in any proportion are miscible. • A substance that does not dissolve in a solvent is insoluble. • Two liquids that can be mixed but separate shortly after are immiscible. Section 14-1

  11. A B C D Section 14.1 Assessment Miscible substances are: A.two liquids that are not soluble in each other B.solids that dissolve in liquids C.solids that do not dissolve in liquids D.two liquids that are soluble in each other Section 14-1

  12. A B C D Section 14.1 Assessment The jerky, random movement of particles in a liquid colloid is known as ____. A.Brownian motion B.Tyndall effect C.Charles’s Law D.kinetic energy Section 14-1

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