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Solubility

Solubility. Bell Ringer. What is Kool-Aid made up of?. https://phet.colorado.edu/sims/html/concentration/latest/concentration_en.html Phet Concentration. https://phet.colorado.edu/en/simulation/legacy/sugar-and-salt-solutions Sugar and Salt Solutions.

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Solubility

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  1. Solubility

  2. Bell Ringer What is Kool-Aid made up of?

  3. https://phet.colorado.edu/sims/html/concentration/latest/concentration_en.htmlhttps://phet.colorado.edu/sims/html/concentration/latest/concentration_en.html Phet Concentration https://phet.colorado.edu/en/simulation/legacy/sugar-and-salt-solutions Sugar and Salt Solutions https://phet.colorado.edu/en/simulation/legacy/soluble-salts Salts and Solubility

  4. How is Kool-Aid made? Pitcher of Water + Kool-Aid Mix Q1: How would you compare the volume of water vs. the volume of mix? Q2: What happens to the mix when added to the water? Q3: Besides making Kool-aid, what else have I made? Q4: What would happen to the color if I added more Kool-aid mix?

  5. Solute • Substance that gets dissolved. • Substance with the least amount Solute + Solvent = Solution • Solvent • Substance that does the dissolving • Substance in the greater amount • Solution • A well mixed mixture in the same phase • Solvent + Solute

  6. How is Kool-Aid made? Pitcher of Water + Kool-Aid Mix Q1: How would you compare the volume of water vs. the volume of mix? Q2: What happens to the mix when added to the water? Q3: Besides making Kool-aid, what else have I made? Q4: What would happen to the color if I added more Kool-aid mix? Q5: Can I add sugar to the Kool-aid? What will happen to it? Q6: Is there a limit to the amount of sugar I can add and have it still dissolve?

  7. Soluble • Able to be dissolved • EX: Sugar and Water Solute • Substance that gets dissolved. • Substance with the least amount Insoluble • Does not dissolve into solution • EX: Sand and Water Solvent • Substance that does the dissolving • Substance in the greater amount Saturated • Maximum amount of solute that will dissolve in a solvent at a given temperature Solution • A well mixed mixture in the same phase • Solvent + Solute Precipitate • Left over solid in a saturated solution • Precipitate SIGNALS Saturation!!

  8. Q7: How can you make a substance dissolve better? Q8: When making a glass of chocolate milk, which is the solvent and which is the solute (syrup or milk)? Q9: How can you make a saturated solution with chocolate milk?

  9. Solubility • The ability of a solute to dissolve • Some substances very soluble in water • Others not very soluble, or insoluble • The process of mixing a solute in a solvent is called dissolving • Insoluble examples: glass or sand in water

  10. Where does salt “go” when it dissolves in water? Water is H2O. Salt is NaCl, sodium chloride. Positive sodium ions attract to the negative end of a water molecule. Negative chloride ions attract to the positive end of a water molecule. One by one the salt crystals get ‘pulled apart’. They go into the spaces between the water molecules. Disassociation

  11. Mixtures

  12. What is Matter???

  13. Mixtures • Mixtures of elements • Mixtures of compounds • Mixtures of Elements and Compounds • Example: Stainless steel • Mixtures of: • Iron • Chromium • Nickel • Carbon

  14. Mixtures Homogeneous Heterogeneous • Looks like it might be just one substance • Solution • Air • Salt Water • White Gold • Suspension • Milk • Blood • Fog • Non-uniform • Can easily see multiple substances • Examples: • Sand in water • Oil and water • Sand and salt

  15. Solution • A homogenous mixture in which all components are of the same phase • Homogeneous – evenly mixed • “homo” = “same” • Example: salt water, food coloring & water, air (oxygen, nitrogen, CO2…)

  16. Solutions & Mixtures

  17. Re-Cap

  18. Solvent Solvent • The component in a solution present in the largest amount • Examples: water, nitrogen (largest % of air)

  19. Solute Solute • Anything in a solution that is not the solvent • Examples: salt, sugar, food coloring

  20. Saturated • A solution containing as much solute as will dissolve • A precipitate signals saturation!!!

  21. Precipitate • A solute that has come out of solution • Above the saturation point, any extra solute is precipitate • Example: rock candy = precipitate

  22. “If you’re not part of the solution, you’re part of the problem.”

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