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Solutions and Diffusion. Solution. a solution is a mixture composed of two or more substances In such a mixture, a solute is dissolved in another substance, known as a solvent . . Solute. The substance which dissolves in a solution. Solvent. - PowerPoint PPT Presentation
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Solutions and Diffusion
Solution
• a solution is a mixture composed of two or more substances
• In such a mixture, a solute is dissolved in another substance, known as a solvent.
Solute• The substance which
dissolves in a solution
Solvent• The substance which
dissolves another to form a solution.
• For example, in a sugar and water solution, water is the solvent; sugar is the solute.
equilibrium
• Chemical equilibrium, the state in which the concentrations of the reactants and products have no net change over time.
• Diffusion equilibrium, when the concentrations of the diffusing substance in the two compartments are equal.
Osmosis • is the net movement of water across a
selectively permeable membrane driven by a difference in solute.
• A selectively permeable membrane is one that allows unrestricted passage of water, but not solute molecules or ions.
Osmosis
Diffusion
• the process by which molecules spread from areas of high concentration, to areas of low concentration.
• When the molecules are even throughout a space - it is called EQUILIBRIUM.
• concentration gradient - a difference between concentrations in a space.
Simple DiffusionClick on the picture above to review diffusion.
See Diffusion HappenClick the picture above to follow the hyperlink.