april 16th chem 11

POLARITY

Today in class, we learned about the polarity of the many solutes and solvents, we took down the following notes:
-Solutes or Solvents must be either polar or non-polar
-Non-polar substances have equal charge distribution (this means that they are symmetrical)
-Polar substances have an unequal charge distribution (this means that they are NOT symmetrical)



<---- H2O is an example of a non polar solution

The lab's objective was to determine if Glycerin is polar or non-polar.

Here's the background information that was written on the lab:

- Sodium chloride is an ionic solid crystalk that forms a crystal lattice structure. When dissolved in solvents, this lattice breaks up and the ions dissociate.

- Sucrose is table sugar and like Sodium Chloride it also forms a crystal structure. Unlike Sodium Chloride however, Sucrose is not ionic; it is molecular. The structure of Sucrose makes the molecule polar.

- Iodine, like Sucrose, is molecular and also forms crystals. However the crystals of Iondine are non-polar.

- Water is a polar solvent

- Paint thinner is a non-polar solvent

- Glycerine is a polar solvent

The result from this lab was that we learned that like substances dissolve, and unlike do not

Here is a video explaining polar and nonpolar molecules