JEE Main 2024ChemistryIonic EquilibriumMediumNumerical

JEE Main 2024 — Ionic Equilibrium Question with Solution

JEE Main 2024 (30 Jan Shift 1)

Question

The pH at which Mg(OH)2 Ksp=1×10-11 begins to precipitate from a solution containing 0.10M Mg2+ ions is ______.

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Show full solutionCorrect answer: 09
Correct answer
09

Step-by-step explanation

Precipitation when Q=Ksp

Q=Reaction quotient, it is the ratio of products to reactants at any time of reaction.

Ksp=Solubility product.

MgOH2⇋Mg2++2OH-

Mg2+OH-2=10-11

0.1×OH-2=10-11⇒OH-=10-5

⇒pOH=5  ⇒pH=14-5=9

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About this question

This is a previous-year question from JEE Main 2024, covering the Ionic Equilibrium chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.