Question

hydration enthalpies of alkaline earth metals are larger than alkali metals why​

Answer 1

Answer:

here's ur answer mate......

The compounds of alkaline earth metals are more extensively hydrated than those of alkali metals. The alkaline earth metals have two electrons more than the nearest noble gas configuration. Therefore, they can easily lose these two electrons to form divalent cation.As a result, the nuclear attraction increases resulting in smaller size of alkaline earth metal ions compared to that of alkali metal ion. Hence, the hydration enthalpy of alkaline earth metals ions is larger than those of alkali metal ions. ... Thus, we say that sulphate of alkaline earth metal r more stable to heat.

Answer 2

The hydration enthalpies of alkaline earth metals is larger than that of alkali metals due to their small size.

• Alkaline earth metals form divalent cations while alkali metals forms monovalent cation to attain nearest noble gas configuration.
• Hence, due to greater nuclear charge on divalent cations, cations of alkaline earth metals are smaller in size than the cations of alkali metals.
• The hydration enthalpy being inversely proportional to the size of the ion,is greater for the smalee alkaline earth metals than that for alkali metals.