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Solubility and Concentration in Solutions

Learn about solubility and concentration in solutions, including types of solutions and their characteristics. Explore how solubility changes with temperature and how to calculate concentration. Also, discover the concept of ions and their role in conducting electricity in the body.

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Solubility and Concentration in Solutions

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  1. Sections 3-4 Homework: Define Vocabulary Ch 23 Chapter 23

  2. Section 3: Solubility and Concentration • Solubility tells: • how much solute is in • an amount of solvent • at a temperature • Everything has its own solubility Ex: If you can dissolve more sugar than salt in 10mL of water, then sugar is more soluble.

  3. Concentration: • Expressed as a percent • 10mL juice + 90mL water = 10% concentration • 50mL juice + 50mL water = 50% concentration • Concentrated solution has a lot of solute • Put too much lemonade mix in the water—very “concentrated” • Put to little in, and its “dilute”

  4. Types of Solutions 1. Saturated Solutions: holds all it can @ temp As temp , amount that can dissolve . Solubility Curve-how much solute dissolves at any temperature.

  5. What mass of sodium nitrate will dissolve in 100cm3 of water at 50°C? About 112g

  6. How much oxygen will dissolve in 100g water at 80C°? 0.5 mg How much oxygen will dissolve in 100g water at 10C°? 1.3 mg

  7. Types of Solutions 2. Unsaturated Solutions: can dissolve more @ a temperature Something saturated can be heated to become unsaturated

  8. Unsaturated and supersaturated are completely dissolved Saturated has some solid on the bottom

  9. Types of Solutions 3. Supersaturated Solutions: has more solute than should @ a temp. Made by raising temp, adding solute, then lowering temp WITHOUT disturbing it Makes it unstable—will crystallize Looks just like others until it’s disturbed

  10. These crystals gain or loose energy like heat.

  11. Did you know . . . Your body needs electricity! Nerve cells transmit signals using electric pulses between nerve endings. To do this, your body needs to have ions! Section 4 – Particles in Solution

  12. IONS: • We know about ions (charged atoms) • Electrolytes - charged and conduct electricity in water • Salt, Sports Drinks, and Vinegar • Nonelectrolytes – no ions; no conduction • Sugar and alcohol Section 4 – Particles in Solution

  13. Homework Review Ch16: 1.A 2.G/H 3.B 4.G 5.D 6.J 1.A 2.F 3.C 4.G 5. D CH 17: 1.D 2.J 3.D 4.H 5.B 6.G 1. D 2.H 3.D 4.G 5.C 6.J

  14. Homework Review Ch 18: 1.C 2.F 3.B 4.G 5.D 6.F 7.A 1.C 2.G 3.C 4.G 5.C 6.J CH 19: 1.B 2.J 3.C 4.G 5.D 6.F 7.B 1.A 2.J 3.B 4.J 5.C 6.J 7.A 8.G

  15. Role – atom of a nonmetal Audience – your parents Format – letter Topic – tell them about your adventures through: --your oxidation number --a metal you bond with, your formula ,and name --a nonmetal you bond with, your formula, and name BE DETAILED—30 points Assessment Review 9/22

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