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Ionic Bonds - masks the charges Fig A and therefore in...

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Ionic Bonds Ionic interactions occur between either fully or partially charged negative and positive groups. The force of attractions between two charges i+ and i- is: force = (i+) (i-)/(r^2D) where D = dielectric constant (1 for vacuum and 80 for water) and r = distance of separation of (i+) and (i-). In the absence of water ionic bonds are very strong but water
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Unformatted text preview: masks the charges ( Fig. A. ) and therefore in aqueous solutions this type of bonding is quite weak. Ionic bonds have a strength of 80 kcal/mole in a vacuum but only 3 kcal/mole in water. • Ionic bonds are further weakened in the presence of salts which easily dissociate into their ionic forms and compete in the bonding process ( Fig. B. )....
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