Download
unit 7 solutions n.
Skip this Video
Loading SlideShow in 5 Seconds..
Unit 7: Solutions PowerPoint Presentation
Download Presentation
Unit 7: Solutions

Unit 7: Solutions

167 Views Download Presentation
Download Presentation

Unit 7: Solutions

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Unit 7: Solutions Properties of Solutions Presentation

  2. Homogenous Solution/Mixture • Formed by a physical change • All solutions are homogenous mixtures • Uniform mixture of substances • Cannot tell that that it is a mixture of two or more substances (can’t see the parts) • Cannot separate by filtration • Must use other means • Designated as aqueous NaCl(aq)

  3. Heterogeneous Mixture • NOT A SOLUTION!!!! • Physical blend of two or more substances • Clearly a mixture • You can see the parts • Can use filtration or other means to separate

  4. 5 Characteristics of Solutions • 1. Homogeneous • 2. Clear (do not disperse light) • 3. Can have color (with a transition metal) • 4. Do not settle upon standing • 5. Will always pass through a filter

  5. Solute Vs. Solvent • 1. Solute- substance that is dissolved when creating a solution • 2. Solvent- substance that does the dissolving when preparing a solution

  6. Like Dissolves Like 3 conditions exist for solution formation • Ionic solute with polar solvent (water) • Polar solute with polar solvent (water) • Non-polar solute with non-polar solvent (acetone) • All other combinations will not work when creating a solution because of lack of particle attractions

  7. Factors Affecting Solution Formation • 1. Type of solute/solvent (must be compatible) • 2. Temperature • High temperature favors dissolving of solids and liquids • Low temperature does not (not enough energy) • Gases will favor opposite conditions (low temperature is good but high is bad) 3. Agitation-stirring brings together solute and solvent

  8. Continued 4. Particle Size: Small particles are better because this increases surface area 5. Concentration: Need to make sure that you have enough solvent 6. Pressure: GASES ONLY!!!!!!!!!!!!!!!!!!!!!! High pressure and low temperature makes gases most soluble Low pressure and high temperature makes gases not soluble