1. Most everyday matter occurs as mixtures—combinations of two or more substances. Section 3: Mixtures of Matter K What I Know W What I Want to Find Out L What I Learned

2. 4(A) Differentiate between physical and chemical changes and properties. 2(G) Express and manipulate chemical quantities using scientific conventions and mathematical procedures, including dimensional analysis, scientific notation, and significant figures. 3(F) Research and describe the history of chemistry and contributions of scientists. Mixtures of Matter Copyright © McGraw-Hill Education

3. Essential Questions How do mixtures and substances differ? Why are some mixtures classified as homogeneous, while others are classified as heterogeneous? What are several techniques used to separate mixtures? Mixtures of Matter Copyright © McGraw-Hill Education

4. Review substance Mixtures of Matter Copyright © McGraw-Hill Education Vocabulary New mixture heterogeneous mixture homogeneous mixture solution filtration distillation crystallization sublimation chromatography

5. Mixtures A mixture is a combination of two or more pure substances in which each pure substance retains its individual chemical properties. A homogenous mixture is a mixture where the composition is constant throughout. Homogeneous mixtures are also called solutions. A heterogeneous mixture is a mixture where the individual substances remain distinct. Mixtures of Matter Copyright © McGraw-Hill Education

6. Interactive Table – Solution Systems Mixtures of Matter Copyright © McGraw-Hill Education

7. Separating Mixtures Filtration is a technique that uses a porous barrier to separate a solid from a liquid in a heterogeneous mixture. Distillation is a separation technique for homogeneous mixtures that is based on the differences in boiling points of substances. Crystallization is a separation technique for homogenous mixtures that results in the formation of pure solid particles from a solution containing the dissolved substance. Mixtures of Matter Copyright © McGraw-Hill Education

8. Separating Mixtures Sublimation is the process of a solid changing directly to a gas, which can be used to separate mixtures of solids when one sublimates and the other does not. Chromatography is a technique that separates the components of a mixture on the basis of tendency of each to travel across the surface of another material. Mixtures of Matter Copyright © McGraw-Hill Education

9. Analyzing Chemicals in Hair Mixtures of Matter Copyright © McGraw-Hill Education

10. Mixtures of Matter Copyright © McGraw-Hill Education Review Essential Questions How do mixtures and substances differ? Why are some mixtures classified as homogeneous, while others are classified as heterogeneous? What are several techniques used to separate mixtures? Vocabulary mixture heterogeneous mixture homogeneous mixture crystallization sublimation chromatography solution filtration distillation