Which of the following alkaline earth metal hydroxides is the least soluble in water? — s Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: The solubility of the hydroxides of Group 2 elements increases from top to bottom. Step 2: This trend is due to the lattice energy of the hydroxides decreasing much more rapidly than their hydration energy down the group. Step 3: Therefore, Be(OH)2 has the highest lattice energy compared to its hydration energy, making it the least soluble in water. This corresponds to option (a).