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Heat of Hydration of Na^(+) (size 102 Pm...

Heat of Hydration of `Na^(+)` (size 102 Pm) = - 397J Kj `mol^(-1)` whereas `Ca^(2+)` (size 100 Pm) = - 1650 kJ `mol^(-1)`. Explain the difference.

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`Ca^(2+)` is smaller in size then `Na^(+)` and also it has higher charge therefore, its hydration energy is more than that of `Na^(+)`
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SUBHASH PUBLICATION-S-Block Elements-Two marks questions and answers
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  18. Which colour is imparted when Lithium, sodium, potassium and Rubidiumk...

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  19. The ionic compounds of alkali metals colourless. Why?

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  20. Alkali metals are good conductors of electricity. Why?

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