Simulations & Videos for

Lesson 5.3: Why Does Water Dissolve Salt?

Accompanying Lesson Plan: Lesson 5.3: Why Does Water Dissolve Salt?

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Sodium Chloride Crystal

  • The larger green spheres represent the negative chloride ions.
  • The smaller gray spheres represent the positive sodium ions.

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Sodium Chloride Dissolving in Water 1

  • The positive areas of the water molecules surround the negative Chloride ions.
  • The negative areas of the water molecules surround the positive sodium ions.
  • As the attractions from the water molecules and their motion pulls the ions apart, the sodium chloride crystal dissolves.

Youtube ID: XNysRr-RCGY

Video
Sodium Chloride Dissolving in Water 2

  • The positive areas of the water molecules surround the negative Chloride ions.
  • The negative areas of the water molecules surround the positive sodium ions.
  • As the attractions from the water molecules and their motion pulls the ions apart, the sodium chloride crystal dissolves.

Video used with permission from Roy Tasker, VisChem Project