Solutions,+suspensions+and+colloids


 * [[file:Solutions and Blood.ppt]]

Solutions ** A solution is a homogeneous mixture of two or more components. The dissolving agent is the solvent. The substance which is dissolved is the solute. The components of a solution are atoms, ions, or molecules, which makes them 10-9 m (10 NANOMETER) or smaller in diameter. Example: Sugar and Water The particles in suspensions are larger than those found in solutions. Components of a suspension can be evenly distributed by a mechanical means, like by shaking the contents, but the components will settle out. Example: Oil and Water Particles intermediate in size between those found in solutions and suspensions can be mixed such that they remain evenly distributed without settling out. These particles range in size from 10-8 to 10-6 m (10 micrometer)in size and are termed colloidal particles or colloids. The mixture they form is called a colloidal dispersion. A colloidal dispersion consists of colloids in a dispersing medium. Example: Milk Liquids, solids, and gases all may be mixed to form colloidal dispersions. Examples: Smoke is a solid in a gas. Fog is a liquid in a gas. Example: Milk of Magnesia is a sol with solid magnesium hydroxide in water. Example: Mayonnaise is oil in water. Examples: gelatin is protein in water. Quicksand is sand in water. You can tell suspensions from colloids and solutions because the components of suspensions will eventually separate. Colloids can be distinguished from solutions using the Tyndall effect. A beam of light passing through a true solution, such as air, is not visible. Light passing through a colloidal dispersion, such as smoky or foggy air, will be reflected by the larger particles and the light beam will be visible.
 * Suspensions **
 * Colloids **
 * More Dispersions **
 * <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">Aerosols **<span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">: solid or liquid particles in a gas.
 * <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">Sols **<span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">: solid particles in a liquid.
 * <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">Emulsions **<span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">: liquid particles in liquid.
 * <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">Gels **<span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">: liquids in solid.
 * <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">Telling Them Apart **<span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">



__**LAB EXPERIENCE**__ "ferric chloride (FeCl3) forms a colorless complex ion ([Fe(H2O)6]3+) in water, but in the presence of the thiocyanate ion it forms the bright red ferric thiocyanate complex: [Fe(H2O)6]3+ + SCN- → [Fe(H2O)5(SCN)]2+ + H2O " <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';"> <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';"> <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';"> <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';"> <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';"> <span style="font-size: 9pt; color: rgb(51, 51, 51); font-family: 'Verdana','sans-serif';">

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