Interactive model, with minimal support
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User can vary charge and temperature. In solution, water molecules form a "shell" around ions. This model illustrates how ions that are solvated by water molecules move.
Students will be able to:
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 other charged particles and push out non-charged particles. Water is attracted to itself, other polar molecules, ionic substances, and somewhat to non-polar substances. However, it attracts to itself much better than to the non-polar substances, so the water tends to exclude (and not dissolve) non-polar substances.
Additional Related Concepts
One can easily observe how only some substances dissolve easily in other substances. This model helps to show what happens when ions are dissolved in a water solution.