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JEE Main202430 Jan 2024Morning ShiftChemistryIonic EquilibriumActual

The pH at which Mg ( OH ) 2 K sp = 1 × 10 - 11 begins to precipitate from a solution containing 0 . 10 M Mg 2 + ions is ______.

Correct answer

0

Step-by-step solution

Precipitation when Q = K sp Q = Reaction quotient, it is the ratio of products to reactants at any time of reaction. K sp = Solubility product. Mg OH 2 ⇋ Mg 2 + + 2 OH - Mg 2 + OH - 2 = 10 - 11 0 . 1 × OH - 2 = 10 - 11 ⇒ OH - = 10 - 5 ⇒ pOH = 5 ⇒ pH = 14 - 5 = 9

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