Term | Definition |
Colloid | A homogenous mixture that does not separate or settle out. The particles will pass through a filter but not a semi-permeable membrane. |
Solution | A homogenous mixture of two or more substances |
Semipermeable membrane | allows solvent molecules such as water and very small solute particles to pass through. |
Suspensions | Contain very large size solute particles. These particles can be seen without a microscope making it heterogeneous. |
Osmosis | Passage of solvent through a semipermeable membrane. |
Dialysis | Passage of small particles as well as water through a semipermeable membrane. |
KSCN | Used to test the presence of FeCl3. Red is a positive result. |
Iodine | Used to test for the presence of starch. A blue-black color is a positive result. |
Tyndall Effect | The ability of light to shine through a solution. Readings can be from strong to dim light. It shows how dense the particles are in the suspension. |
Acid | A substance that ionizes and produces H+ ion when dissolved in water. |
Base | A substance that produces OH- when dissolved in water or an H+ acceptor. |
Ammonia shown as a base | A water molecule has to be included as a reactant. |
Buffer | A solution that will resist changes in pH when small amounts of acid or base are added. |
Buffer systems | Comprised of a weak base and the salt of a weak base. |
Example of weak acetic acid | HC2H3O2 (acetate) --> acetic acid |
Three common buffers that regulate the human body | carbonate system, phosphate system and the protein system |
Blue | base |
Red | acid |
Solute concentration | Amount of solute dissolved in a certain amount of solvent or solution. |
Molarity | Number of moles of solute per liter of solution and is given the symbol M. |
Molar mass | |