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JEE Main2012ChemistryIonic EquilibriumActual

The solubility of PbI ₂ at 25^ C is 0.7 ~g ~L ⁻¹ . The solubility product of PbI ₂ at this temperature is (molar mass of PbI ₂=461.2 ~g ~mol ⁻¹ )

Options

  1. A1.40 10⁻⁹
  2. B0.14 10⁻⁹
  3. C140 10⁻⁹
  4. D14.0 10⁻⁹

Correct answer

D. 14.0 10⁻⁹

Step-by-step solution

PbI ₂ Pb ⁺⁺+2 I ⁻ aligned K_ sp = & s (2 s)^2=4 s^3 & =4 ( 0.7 461.2 )^3=14.0 10⁻⁹ aligned

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