Amongst the following hydroxides, the one which has the highest value of Ksp at ordinary temperature — s Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: The solubility product constant (K_sp) represents the solubility limit of these sparingly soluble hydroxides in water. Step 2: The solubility of alkaline earth metal hydroxides increases systematically down the group (Mg(OH)2 < Ca(OH)2 < Sr(OH)2 < Ba(OH)2) because lattice energy decreases much faster than hydration energy down the group. Step 3: Consequently, Ba(OH)2 is the most soluble and has the highest K_sp value, matching option (d).