A-LevelChemistryChemical bondingOct/Nov 2017Paper 4 Q511 Marks
The arrangement of the anions around a cation is called the geometry of the cation; e.g. in [CuCl4]2- the geometry of copper is tetrahedral and the co-ordination number of copper is 4. The geometry of a cation in an ionic compound can be predicted from the ratio of the ionic radii of the cation and anion involved. [Table 5.1: Cation radius/anion radius vs. geometry of cation] Use data from the Data Booklet to predict the geometry of, and hence the co-ordination number of, the cation for
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