crystals, solubilities and precipitation
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7 Terms
What are ionic compounds made up of?
Positive and negative ions. The positive attatcts the negative which holds the ions together
What if a crystal is an ionic compound?
It has alternating positive and negative ions and the attraction holds the crystal together
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.
Why do some compounds not dissolve?
The attraction between the ions is too strong for water to overcome and separate them.
Hydrated
Water is tightly bound within the crystalline structure of a salt (ionic compound)
Anhydrous
A hydrated compound will lose all of its water of crystallisation when it is heated.
Water of crystallisation
The water molecules chemically bound within a crystalline structure
