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Page 4 Formation of water shells around ions
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In solution, water molecules form a "shell" around ions. This model illustrates how ions solvated by water molecules move. Note, however, this 2D model does not depict the real shell structure, which in reality is 3D.
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org.concord.modeler.text.LineIcon600.020030010015<html><center><br><br><br><font size ="8">Formation of Water Shells Around Ions</font><br>Page 4 of 7</center></html>-333334
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Charge on the purple ion
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Execute MW script
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Charge on the green ion
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Cool
Raised Bevel
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Cool the system down
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Show Charge
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Show Charge
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<html>
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<body face="Verdana">
Water is a great solvent, but all substances that water can dissolve must
be either polar or ionic (either positively or negatively charged). The
polar water molecules attract charged particles and push out non-charged
particles. Water is attracted to itself, to other polar molecules, ionic
substances, and to polar substances.
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Pg 4 Formation of water shells around ions$0.mmlfalsetrue
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13. Water would NOT be attracted to which of the following?
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Itself
Polar covalent compounds
Nonpolar covalent compounds
Ionic substances
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14. Run the model as it was originally set and describe your observations
regarding how the particles interact.
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15. Using the sliders above the model, give the purple sphere a positive
charge and the green sphere a negative charge. Run the model again and
describe how the interactions appear to change compared to the original
settings.
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16. Now cool the system and click "Show Charge." Describe, in detail, the
interaction and orientation of the water molecules and charged particles.
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