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_ N_Water and Ice Part II
    
 Table of Contents
  Introductory Comments
  What is Molecular Modeling?
  Why is Molecular Modeling Important?
  What do some common molecules look like?
  Where's the Math?
  Carbon 3 Ways
  Carbon Compounds
  Water and Ice
  Water and Ice pt.II
  How to view structures in class or at home
  MathMol Library of Structures.
  Tutorial 1: 1-Dimension, 2-Dimensions, 3-Dimensions...
  Tutorial2: The Geometry of 2 Dimensions..
  Tutorial3: The Geometry of 3- Dimensions
  Tutorial4: The Geometry of Molecules.
  Appendix1: Scientific Notation
  Appendix 2: Mass
  Appendix3: Volume
  Appendix4: Density
 

 

What will happen when these two water molecules approach each other?

See the Water Dimer Page for a Flash Animation.

What did you observe?

What are some properties of a single water molecule?

Each color represents a different atom type. What type of atom is red? white?

The following images show a single water molecule after it has been rotated 90, 180, 270 and 360 degrees.

Does water show any symmetry?

Water is formed when two atoms of hydrogen combine with one atom of oxygen. The single electrons in the hydrogen atoms are drawn to oxygen which only has 6 electrons in its valence shell. How will this affect the charge on the water molecule?

In physics you learned that like charges repel and unlike charges attract. The above animation shows what happens when two water molecules approach. What would expect might happen if we surround a single molecule of water with four other molecules of water? Take a look at this image frozen in time.

click on image for pattern

Do you recognize any familiar geometric pattern? What distances might each water molecule be from each other?

Can you predict the pattern for 8 water molecules? See image

The above simulations were all performed at very low temperatures (below the freezing point of water. At higher temperatures molecules are in rapid motion. What would you expect the motion to look like at a higher temperature, say at room temperature?

Movie

 

 


Questions or Comments?


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