sblock Elements 2 Question 21
23. The crystalline salts of alkaline earth metals contain more water of crystallisation the corresponding alkali metal salts. Why?
(1997, 2M)
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Solution:
- Alkaline earth metal salts have $M^{2+}$ ions which has very high polarising power compared to polarising power of monovalent metal ion $\left(M^{+}\right)$of alkali metal. Due to high polarising power of $M^{2+}$, it associate more water than $M^{+}$.
