Why molbilities of `H^(o+)` ions in ice is greater as compared to liquid water.

Explanation

The density of liquid water is more as compared to that if ice. Therefore, ionic mobility is expected to be less in water as compared to ice. Moreover in water, the `H^(+)` ions get hydrated i.e., `H^(+)`(aq). Since the hydrated ions are heavier than the `H^(+)` ions, the ionic mobility of the hydrated ions is less.