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Solubility and Solution Types

Learn about saturated, unsaturated, and supersaturated solutions and how to interpret solubility curves. Explore the factors that affect solubility and play a fun "battleship" game to reinforce learning.

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Solubility and Solution Types

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  1. DO NOW: (on back of NOTES) • What does it mean if a solution is saturated? • What does it mean if a solution is unsaturated? • What does it mean if a solution is supersaturated?

  2. Notes Unit: Acids, Bases, and Solutions Solubility Curves

  3. After today you will be able to… • Interpret a solubility graph to determine whether a solution is unsaturated, saturated, or supersaturated. • Interpret a solubility graph to determine the amount of solute needed to saturate a solution at a specific temperature.

  4. Solubility refers to the maximum amount of solute that will dissolve in a given amount of solvent at a certain temperature and pressure.

  5. The units of solubility are grams of solute/100g of solvent. Remember, the solute dissolves into the solvent!

  6. Remember 2 Important Factors that Affect Solubility: Temperature: Solids become more soluble as temperature increases: solubility of solids increase with increasing temperature. For gases: as a solution with dissolved gas is heated, the particles gain kinetic energy, allowing them to escape from solution. As temperature increases, solubility of gases decreases. This is why a hot coke left open will taste flat.

  7. Remember 2 Important Factors that Affect Solubility: 2. Pressure affects solubility of gases only. Solubility of gases increases as pressure increases. In bottling sodas, carbon dioxide is added to the solution under high pressure.

  8. Interpreting Solubility Curves: 1. Any point on the curve refers to a saturated solution. (full)

  9. Interpreting Solubility Curves: 2. Any point below the curve refers to an unsaturated solution (not yet full)

  10. Interpreting Solubility Curves: 3. Any point above the curve refers to a supersaturated solution (over full)

  11. Interpreting Solubility Curves: 4. The difference between the point above the curve and on the curve represents the amount of solute which will precipitate out (fall out of solution)

  12. Interpreting Solubility Curves: 5. Solutes whose curves move upward with increased temperature are typically solids because the solubility of solids increases w/ increased temperature.

  13. Interpreting Solubility Curves: 6. Solutes whose curves move downward with increased temperature are typically gases because the solubility of gases decreases with increased temperature.

  14. Battleship Directions: 1. Choose 1 solute (this is your “battleship”) 2. Ask your partner about an amount of grams of solute and a temperature. Your partner will answer “unsaturated,” “saturated,” or “supersaturated.”

  15. Battleship Directions: 3. Use your partner’s answer to figure out where their “battleship” is!

  16. Example Game: My Battleship/Solute is:________________ My Partner’s Battleship/Solute is:________

  17. Questions?Begin WS!

  18. Silence is GOLD-en!

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