Thursday 16 May 2013

TRIPLE: 1.35 understand the relationship between ionic charge and the melting point and boiling point of an ionic compound

The relationship between the ionic charge and boiling/melting points

For ions of similar size, the strength of the forces of attraction between the ions will depend on the size of their charge. For this reason, magnesium oxide (Mg²+O²-) has a higher melting and boiling point than sodium chloride (Na+Cl-). The more electrons that have been transferred, the stronger the bond because of the stronger electrostatic forces.
 

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