How does the nature of the molecule, polar or non-polar, affect its solubility in water, the universal solvent? 

Students interact with molecular models created via Molecular Workbench to make predictions, observations and conclusions about dissolving and polarity.  Students then extend their thinking with a final activity listed below.  Activity is customizable via the ITSI-SU web. 

Attributes of Lesson:

Simulation
Java
Student computers
Internet

Time Needed:  40 - 80 minutes

Students will use molecular models that demonstrate how water dissolves substances and how nonpolar substances are not attracted to water molecules. 

Students explain results and then are asked to extend their thinking by predicting which substances will dissolve in water based on there structure

What is meant by the expression "Like dissolves like"?

Will all solvents dissolve all solutes?

Why is rubbing alcohol miscible in water, while cooking oil is not?

When a ruler is charged, has static electric charges, is placed near a stream of water the water is attracted to the ruler. The water "bends", due to its polarity!

See the link below for the interactive resource.  After creating a free account, you will have access to all ITSI-SU Math and Science interactive resource and lessons.

Like Dissolves Like - Water the Unversal Solvent SAS/ITSI-SU 2027

The Concord Consortium: http://www.concord.org/

soluble miscible dissolve water polarity dissolving solubility polar non polar solvent solute hydrophobic hydrophillic chemistry activity models model itsi itsisu concord