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Mixtures!

Mixtures!. Q: What is the dullest element? A: Bohrium. Chapter 9.3 Part 1. Key concepts:. Describe 3 properties of mixtures Describe 4 methods of separating mixtures Give everyday examples of mixtures. Key Vocabulary:. Mixture Concentration Solubility Suspension Colloid Solvent

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Mixtures!

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  1. Mixtures! Q: What is the dullest element? A: Bohrium Chapter 9.3 Part 1

  2. Key concepts: • Describe 3 properties of mixtures • Describe 4 methods of separating mixtures • Give everyday examples of mixtures

  3. Key Vocabulary: • Mixture • Concentration • Solubility • Suspension • Colloid • Solvent • Solute • Solution

  4. Imagine a world of legos: ELEMENTS: Make up compounds and mixtures:

  5. Mixtures: What does pure mean? How is this different from an compound? What are some examples of chemical and physical changes? • A mixtureis a combination of two or more substances that are not chemically combined. • How are mixtures different from compounds? • They form a mixture when they don’t chemically react like a compound • Think about trial mix or a pizza… • Can you taste the tomato pasta? Meat?

  6. SAY WHAT! • What does it mean to not be chemically combined? • Example? • When you do chemically combines it, what happens? • Why do mixture’s substances keep their individual properties while compounds don’t? • How many atoms are in the following samples? • CaCO3 • C6H12O6 • NaCl

  7. Got to keep them separated! Know figure 1 on page 244 • You can separate mixtures physically. • What about compounds? • When discussing ratios of elements that make up mixtures, it is not definite, like compounds

  8. Quick Questions: • Infer • How does separating blood into several layers in a centrifuge show that blood is a mixture instead of a pure substance?

  9. Demonstration time: HYPOTHESIS • How can I separate these? • What do you think? • What would you do? • Can all mixtures be separated easily? • “Chemicals can form mixtures, but no chemical change happens when a mixture is made. That means that each chemical keeps its original identity. The pepperoni and olives on the pizza don’t change when they are mixed. Making a mixture is a physical change.”

  10. Compound vs. Mixture! What are some similarities and differences between compounds and mixtures?

  11. Separation!

  12. Quick question: • How is the ratio of components in a mixture different from the ratio of elements in a compound?

  13. What mixtures do you know of? • You are surrounded by mixtures. Mixtures make up the food you eat, the school supplies you use, and the clothes you wear. AND MOST IMPORTANTLY…US! • What have you seen or heard of?

  14. Review: • How do mixtures differ from elements and compounds? • How can mixtures be separated?

  15. Homework: • Vocabulary cards for the following term: • Mixture • Workbook pages: • Page 119-122: • Use your books as you do this Q-tips says, “Q: Why do chemists call helium, curium and barium the medical elements? A: Because if you can't helium or curium, you barium!

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