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Drill 1.3.11

Drill 1.3.11. 1- What is diffusion? 2- What is the difference between a solute and solvent? 3- 50 g of sodium chloride is dissolved in water. Identify the solute and the solvent. 4- How is concentration related to the way a solute moves? That is, in what direction does a solute move?.

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Drill 1.3.11

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  1. Drill 1.3.11 • 1- What is diffusion? • 2- What is the difference between a solute and solvent? • 3- 50 g of sodium chloride is dissolved in water. Identify the solute and the solvent. • 4- How is concentration related to the way a solute moves? That is, in what direction does a solute move?

  2. Moving Moving Molecules! • Passive transport = NO ENERGY • Molecules are moving from _______ concentration to _______ concentration • Active transport = NEEDS ENERGY • Molecules are moving from _______ concentration to _______ concentration

  3. Passive Transport • No energy!!!! • Diffusion = MOVEMENT OF SOLUTE • Osmosis = MOVEMENT OF WATER

  4. Diffusion • Movement of solute from ______ to ______ concentration • At what point does diffusion stop?

  5. Examples of diffusion • Perfume • Making tea • Someone smoking a cigarette • How might diffusion explain why a helium balloon deflates slowly over time?

  6. Simple and Facilitated Diffusion

  7. Osmosis • Movement of water from ______ concentration to ______ concentration • This is different from diffusion! How?

  8. Let’s think about this • Osmosis involves the movement of water • **across a semi-permeable membrane** • Water moves from high to low water concentration • Moves from low to high solute concentration

  9. Examples of osmosis • Why your lips dry out when you eat salty foods! • Plants (and plant cells) becoming rigid • How your kidneys work! • Water intoxication syndrome (not good)

  10. 1. Animal cell 2. Animal cell 3. Animal cells 4. Plant cell

  11. Red blood cells and Osmosis

  12. Homework • Passive transport worksheet • Know the difference between solute and solvent • Describe how solutes move • Know the difference between simple diffusion and facilitated diffusion • Know the difference between diffusion and osmosis • Describe how water moves

  13. Tomorrow: Egg lab!! • 4 days of observations and fun!

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