The solubility of a sparingly soluble salt A OH 2 (mol. wt. 192.3) is 19 .23 g / litre at 300 K . The pH of its saturated solution assuming 80% ionisation at 300 K is :

Question

The solubility of a sparingly soluble salt A OH 2 (mol. wt. 192.3) is 19 .23 g / litre at 300 K . The pH of its saturated solution assuming 80% ionisation at 300 K is :, 1.0970, 12.9030, 13.2041, 12.0000

MARKS App · Accepted Answer

S = 19.23 192.3 mol/litre = 0.1 M A OH 2 ⇌ A 2 + + 2 OH - 2 S ∴ OH - = 0.1 × 2 × 8 0 1 0 0 = 0.16 ∴ pOH = 0.7958 ∴ pH = 13.2041

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