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  • The alkaline earth metal nitrate that does not crystalline with water molecule is -Option: 1 <img alt="\mathrm{Ca(No_3)_2}" src="https://entrancecorn

The alkaline earth metal nitrate that does not crystalline with water molecule is -

Option: 1

\mathrm{Ca(No_3)_2}


Option: 2

\mathrm{Sr(No_3)_2}


Option: 3

\mathrm{Ba(No_3)_2}


Option: 4

\mathrm{Mg(No_3)_2}


Answers (1)

best_answer

A saturated aqueous solution of \mathrm{M\left(\mathrm{NO}_3\right)_2} Hydration of an ion depends on its size. Smaller the size of an ion, higher will be its charge density and as a result it will remain more solvated (hydrated) through ion dipole interaction.
Size of group 2 metals ions increases on going down the group. So, their ability to form hydrated crystals follows the orders:-
\mathrm{Be}^{2+}>\mathrm{Mg}^{2+}>\mathrm{Ca}^{2+}>\mathrm{Sr}^{2+}>\mathrm{Ba}^{2+}
Thus, \mathrm{Ba}\left(\mathrm{NO}_3\right)_2 is slightly or almost soluble in water.

Hence 3 is correct option

Posted by

Devendra Khairwa

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