Group II Elements Flashcards
1
Q
Why does the solubility of group II sulphates decrease down the group?
A
This is because the hydration energy of sulphates get increasingly lower than the lattice energy with increasing cation size.
2
Q
Why does the solubility of group II hydroxides increase down the group?
A
This is because of the rapidly decreasing lattice energy, which allows hydration to occur. Because of this dissolution, there are more OH- ions present in the solution, hence why it gets more basic.
3
Q
Why does the stability of hydrides decrease down the group?
A
Hydride stability decreases down the group due to increasing atomic size; because of the greater distance between the hydride atoms, the bond between them can easily be broken.
