Unit 2, Lesson 2.3 - Mixtures

Unit 2, Lesson 2.3 - Mixtures

Lesson Outline:
1. Mixture
2. Types of Mixtures
3. Separating Mixtures

1. Mixtures (Unit Two, Lesson 2.3) By Margielene D. Judan

2. Lesson Outline Mixture Types of Mixtures Separating Mixtures

3. Mixture 2 or more substances held together by physical forces They do not create a new substance

4. Types of Mixtures Homogeneous Mixture Heterogeneous Mixture

5. Homogeneous mixture Homo means “same” Components are evenly distributed Cannot be separated by physical means

6. Examples Solutions Colloids others

7. Heterogeneous mixture Hetero means “different” Components are not evenly distributed Can be separated by physical means

8. Examples Suspensions Emulsions others

9. Identify the following if it is a homogeneous or heterogeneous mixture:

10. Sand + water

11. Answer: Heterogeneous They are distinguishable. Water Sand

12. Juice powder + water

13. Answer: Homogeneous You can’t distinguish the parts of the mixture They have been evenly mixed. Water?? Juice Powder??

14. Homogeneous or heterogeneous?

15. Answer: Heterogeneous They are distinguishable and can be physically separated. Red M&M’s Orange M&M’s Yellow M&M’s Brown M&M’s etc

16. Is air a mixture? If so, what kind?

17. Yes. Air is composed of 78 % nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide, and other gases. Since you cannot distinguish them, air is a homogenous mixture.

18. Common Methods of Separating Mixtures Picking Magnetic Separation Decantation Distillation Solar Evaporation Filtration

19. Picking large solid to solid mixture

20. Magnetic Separation Solid to solid metal mixture

21. Filtration Solid(not dissolved) to liquid mixture

22. Solar Evaporation Solid (dissolved) to liquid mixture

23. Decantation Liquid to liquid non-dissolvable mixture Solid (settled on bottom) to liquid mixture

24. Distillation Liquid to liquid mixture

25. Separating Mixtures summary Method Component 1 Component 2 Example Picking solid (large chunks) solid rock and gravel Magnetic Separation solid (metal) solid sulfur powder and iron fillings Decantation liquid or solid (non-dissolvable) liquid sand and water oil and water Distillation liquid liquid oil and water alcohol and water Solar Evaporation solid (dissolvable) Liquid salt and water Filtration Solid (non-dissolvable) Liquid or solid sand and gravel sand and water

26. Separating mixtures are not limited to one method. For example, you could separate sand and water through decantation, filtration, and evaporation, though some methods work best in different situations.

27. Activity: (1 whole sheet of paper) 1. Write a short paragraph about the mixtures you see at home, and tell why are they important to us. (5 pts) Then, relate the lesson to your spiritual life. (5 pts)

28. Assignment: Notebook I. Classify whether it is a homogeneous or heterogeneous mixture. air sand water i nk different types of stones o il and water

29. Assignment: Notebook II. Identify which method is best to use in order to separate the following mixtures: M&M’s chocolate Alcohol and water Saltwater Sand and gravel Iron fillings and talc powder

30. Sources: Science Links 7 https://www.youtube.com/watch?v=TlxajGi8bAI