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Solute and Solvent

Solute and Solvent. Mixtures and Solutions. Matter. Heterogeneous materials - can see two parts. Homogeneous materials can see only one thing - one set of properties. Homogeneous mixtures They’re mixed together so well you only see one thing – it looks pure but it isn’t. Pure substances

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Solute and Solvent

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  1. Solute and Solvent Mixtures and Solutions

  2. Matter Heterogeneous materials - can see two parts Homogeneous materialscan see only one thing - one set of properties Homogeneous mixtures They’re mixed together so well you only see one thing – it looks pure but it isn’t Pure substances You can only see one thing because there is only one kind of particle in it. Mechanical Mixture Solution

  3. Review Solutions • Are solutions homogeneous or heterogeneous? • Homogeneous • Are solutions mixtures or pure substances? • Mixtures • What kind of states can a solution be? • Solid, liquid, or gas • What are the two “s” words that every solution must have? • A solute and a solvent

  4. In a salt water solution… • Is salt the solute or the solvent? • Solute • Is water the solute or the solvent? • Solvent • What does the solute do? • Gets dissolved • What does the solvent do? • Does the dissolving

  5. A Salt Water Solution Solute (salt) Solvent (water)

  6. Factors Affecting How Fast a Solute Dissolves • Temperature • Stirring or Shaking • Crushing (Surface Area) • Pressure

  7. 1. Temperature If we heat particles they will move faster • The solvent will carry the solute particles away faster

  8. So… • Hotter = Dissolve Faster

  9. 2. Stirring or Shaking Stirring or shaking a solution moves the solute particles around so that they are closer to water particles • the water particles can then attract them easily and carry them away!

  10. So… • Stir or Shake = Dissolve Faster

  11. 3. Crushing (Surface Area) When a sugar cube is broken into small pieces, the individual sugar particles can get closer to water particles • the water particles can then attract them easily and carry them away!

  12. Dissolving happens on the surface of particles • When solute is broken up, there is more surface area where dissolving can occur broken up

  13. 4. Pressure Pressure is used to dissolve carbon dioxide gas in liquid pop Pressure forces gas particles into the spaces between the liquid particles gas

  14. So… • More pressure = Dissolve Faster

  15. Exteme Example of Pressure Altitude Sickness and Nitrogen Narcosis (“The Bends”)

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