Question

Among the following ions which has the largest ionic radius in aqueous phase?

• A. $L{i}^{+}\left(aq\right)$
• B. $N{a}^{+}\left(aq\right)$
• C. $K^{+}\left(aq\right)$
• D. $C{s}^{+}\left(aq\right)$

Answer 1

The correct option is A $L{i}^{+}\left(aq\right)$

$L{i}^{+}\left(aq\right)$; due to extensive hydration of $L{i}^{+}$ ion in water.
Because hydration is inversely proportional to the size of ion in the gaseous phase.