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Chapter 15: Solutions

Chapter 15: Solutions. Chapter 15 Solutions. What are Solutions? (15.1 ) Solution - homogeneous mixture made up of individual molecules, atoms or ions . B. Solute – the substance being dissolved F or example: salt, sugar, food coloring

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Chapter 15: Solutions

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  1. Chapter 15: Solutions

  2. Chapter 15 Solutions • What are Solutions? (15.1) • Solution- homogeneous mixture made up of individual molecules, atoms or ions. B. Solute – the substance being dissolved For example: salt, sugar, food coloring C. Solvent - the substance doing the dissolving For example: water

  3. Dilute vs. Concentrated Solutions

  4. Factors that affect rate of dissolving (“dissolution”)– must increase collisions between solute and solvent • Agitating the mixture (stirring)

  5. Factors that affect rate of dissolving “dissolution”)– must increase collisions between solute and solvent • Increasing the surface area

  6. 3. Increasing the temperature which increases the kinetic energy dissolving sugar for syrup

  7. III. Solubility (15.1) Unsaturated the amount of solute dissolved is less than the maximum that could be dissolved NaCl(s) Na+1(aq) + Cl-1 (aq)

  8. III. Solubility (15.1) Saturated solution holds the maximum amount of solute per amount of the solution under the given conditionsNaCl(s) Na+1(aq) + Cl-1 (aq) Supersaturated solutions contain more solute than the usual maximum amount and are unstable • They cannot permanently hold the excess solute in solution and may release it suddenly back into solid state NaCl(s) Na+1(aq) + Cl-1 (aq)

  9. Helpful Youtube video links: • Solute solvent solution dissolving: http://www.youtube.com/watch?v=hydUVGUbyvU • Unsaturated, saturated, supersaturated, solutes’ effect on freezing point http://www.youtube.com/watch?v=VTmfQUNLlMY • Overview/Application: http://www.youtube.com/watch?v=9h2f1Bjr0p4 • Freezing point depression/colligative properties/ice cream: http://www.youtube.com/watch?v=TBkNstDmtj0 • Background and Molarity and M1V1 = M2V2 calculations: http://www.youtube.com/watch?v=F2BRpFihX3M

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