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Factors That Affect the Rate of Dissolving and Solubility

Factors That Affect the Rate of Dissolving and Solubility. Ch. 7.2 Pg 243. The Main Factors. Temperature Why? Kinetic Energy Agitating the mixture Shake or Stir Decreasing the size of the particles Greater Surface Area!!!!!. Why solutes dissolve in solvents.

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Factors That Affect the Rate of Dissolving and Solubility

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  1. Factors That Affect the Rate of Dissolving and Solubility Ch. 7.2 Pg 243

  2. The Main Factors • Temperature • Why? Kinetic Energy • Agitating the mixture • Shake or Stir • Decreasing the size of the particles • Greater Surface Area!!!!!

  3. Why solutes dissolve in solvents • When the forces of attraction between different particles in a mixture is stronger than the attraction of like particles in the mixture, a solution forms.

  4. Examples • NaCl and Water? • Vinegar (CH3COOH) and Water? • Vinegar (CH3COOH) and Oil (C18H34O2)? • Oil (C18H34O2) and Hexane (C6H14)?

  5. Like Dissolve Like Polar Compounds eg. Sucrose,C12H22O11 Polar Solvent eg. Water, H2O Dissolve In do not dissolve in Non-Polar Compounds eg. Iodine, I2 Non-Polar Solvents eg. Benzene,C6H6(l) Dissolve In

  6. Intermolecular Forces • Dipole-Dipole Interactions and Ion-Dipole Interactions • Ions that are completely surrounded by water, we can say that the ions are hydrated. ( NaCl in water) • A solution that dissolved in water and conducts electricity is called an Electrolyte. (Gatorade)

  7. Important!!!!! • Not all ions dissolve in water. If a compound has a very strong Ionic Bond it will not dissolve in water. Ex. AgCl2. • We can use the difference in electronegativitiesof elements to predict if a binary(2 elements) compound will dissolve in water. If it the difference is high, it will dissolve. If it is low it will not.

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