Solubility of Compounds with Different Polarities

​describe and analyse the processes involved in the dissolution of ionic compounds in water

​solubility and solubility rules

​solubility product

​Ksp calculations

​separating of positive and negative ions from a solid ionic compound, forming hydrated ions when dissolved in water = dissociation

• ​ionic bonds in lattice are broken

• ​hydrogen bonds in water are broken

• ​ion-dipole attractions form between ions and polar water molecules

​soluble or insoluble

• ​the energy required to separate the ions from the lattice is greater than the energy released when the ions are hydrated

​maximum amount of solute that can be dissolved in a given quantity of a solvent

​Revision from Year 11

​Reality is that ionic substances that are classified as insoluble, can still dissolve to some extent

​Solubility depends on the difference in the energy required to separate the ions from the lattice, and the energy released when the ions are hydrated

​contains the maximum amount of solute that can be dissolved at a particular temperature

​we should call bsolids, sparingly soluble

• ​e.g. NaCl solutions are