crystals, solubilities and precipitation

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7 Terms

1
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What are ionic compounds made up of?

Osotive and negative ions. The positive attatcts the negative which holds the ions together

2
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What is a crystal if an ionic compound?

It has alternating positive and negative ions and the attraction holds the crystal together

3
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Why do ionic compounds dissolve?

Positive and negative ions separate from each other and move in between water molecules. Ions are small so the particles are no longer visible.

4
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Why do some compounds not dissolve?

The attraction between the ions us too strong for water to overcome and separate them.

5
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Hydrated

Water is tightly bound within the crystalline structure of a salt (ionic compound)

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Anhydrous

A hydrated compound will lose all of its water of crystallisation when it is heated.

7
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Water if crystallisation

The water molecules chemically bond withing a crystalline structure