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Question: Answered & Verified by Expert
The solubilities of carbonates decrease down the magnesium group due to a decrease in
Chemistrys Block ElementsJEE MainJEE Main 2003
Options:
  • A
    hydration energies of cations
  • B
    inter-ionic attraction
  • C
    entropy of solution formation
  • D
    lattice energies of solids
Solution:
1978 Upvotes Verified Answer
The correct answer is:
hydration energies of cations
The solubility is governed by $\Delta \mathrm{H}_{\text {solution }}$ i.e. $\Delta \mathrm{H}_{\text {solution }}=\Delta \mathrm{H}_{\text {lattice }}-\Delta \mathrm{H}_{\text {Hydration }}$.
Due to increase in size the magnitude of hydration energy decresaes and hence the solubility.

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