Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

Question

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?, K, Rb, Li, Na

MARKS App · Accepted Answer

Ionic mobility ∝ 1 S i z e o f h y d r a t e d i o n As on moving down the group size of hydrated ion decreases so ionic mobality increases. L i + . n H 2 O N a + . n H 2 O K + . n H 2 O R b + . n H 2 O I o n i c m o b i l i t y ↑ a s s i z e o f i o n ↓

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