Application of Solutions Properties

Application of Solutions Properties

Learning Goal :

* Identify a mixture as a solution, a colloid, or a suspension.
* Describe how the number of particles in a solution affects the osmotic pressure of a solution .
i.e. The size and number of solute particles in different types of mixtures play an important role in determining the properties of that mixture.
*Isotonic , Hypotonic and Hypertonic .
*Dialysis .

**** Solution ****
We already talk about solutions from previous lecture ..
The solution appears transparent, although it may have a color. The particles are so small that they go through filters and through semipermeable membranes.
A semipermeable membrane allows solvent molecules such as water and very small solute particles to pass through, but does allow the passage of large solute molecules.

Colloids:
The particles in a colloid are much larger than solute particles in a solution.
Colloidal particles are large molecules, such as proteins, or groups of molecules or ions.
Colloids, similar to solutions, are homogeneous mixtures that do not separate or settle out.
Colloidal particles are small enough to pass through filters, but too large to pass through semipermeable membranes.

Suspension :

Suspensions are heterogeneous that are very different from solutions or colloids.
The particles of a suspension are so large that they can often be seen with the naked eye.
They are trapped by filters and semipermeable membranes.
You can find suspensions among the medications in a hospital or in your medicine cabinet.
These include Kaopectate, calamine lotion, antacid mixtures, and liquid penicillin.