Ionic mobility of which of the following alkali metal ions is lowest when aqueous
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?
(1) K (2) Rb (3) Li (4) Na
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(3) Li+ being smallest, has maximum charge density. Li+ is most heavily hydrated among all alkali metal ions. Effective size of Li+ in aqueous solution is therefore, largest. So, moves aslowest under electric field.
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