1. DAILY QUESTION November 10, 2008 1. What is a solvent and a solute?

2. Agenda11/10/08 Daily Question Ch 7 Section 1 Notes Assignments: 1. Ch 7 Sect 1 Review Wksht due 11/11

3. Heterogeneous Mixtures Suspensions –Particles are large and eventually settle out –Particles may be filtered out Examples: Orange Juice Immiscible Liquids –Are liquids that do not mix –Can be separated by Decanting pouring a lighter liquid off a heavier liquid

4. Heterogeneous Mixtures Colloids –Particles are smaller, cannot be filtered out –Particles scatter light, Tyndall effect Examples: Jello, egg whites, smoke, fog

5. Heterogeneous Mixtures Emulsion – a colloid in which liquids that do not normally mix are spread throughout each other Examples: Mayo, Bile, cream –Emulsifiers – keep droplets dispersed so they spread throughout the mixture

6. Homogeneous Mixtures Are Uniform Examples: Salt water Are solutions –Solute: substance that dissolves Example: salt –Solvent: substance in which the solute dissolves Example: water

7. Homogeneous Mixtures Miscible liquids –Two or more liquids that form a single layer –Can be separated by distillation When a mixture is heated, one liquid will boil away first, leaving the other liquid behind

8. Homogeneous Mixtures Some liquid solutions do not have water –Fingernail polish remover –Paint strippers –Gasoline –Petroleum

9. Homogeneous Mixtures Solutes and Solvents can be any state –Liquid-liquid: vinegar –Gas-gas: Air you breathe –Gas-liquid: Soft drinks –Solid-gas: Mothballs –Solid-solid: Brass Alloys: two or more metals form a homogeneous mixture