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99 Percentile Qs Bank for JEE MainChemistryIonic Equilibrium

MY and N Y 3 , two nearly insoluble salts, have the same K s p of 6.2 × 10 - 13 at room temperature. Which of the following statement is true with respect to MY and N Y 3 ?

Options

  1. AThe molar solubilities of MY and N Y 3 in water are identical.
  2. BThe molar solubility of MY in water is less than that of the molar solubility of N Y 3 .
  3. CThe salts MY and N Y 3 are soluble more in 0 . 5   M   KY than the pure water.
  4. DThe addition of salt KY to the solution of MY and N Y 3 does not have any effect on their solubilities.

Correct answer

B. The molar solubility of MY in water is less than that of the molar solubility of N Y 3 .

Step-by-step solution

For MY , an insoluble salt, K s p = s 2 M Y   s ⇌ M +   aq + Y -   aq For N Y 3 , an insoluble salt, K s p = 4 s 3 N Y 3   s ⇌ N +   aq + 3 Y -   aq ∴   S M Y = 6 . 2 × 10 - 13 = 7 . 8 × 10 - 7 ∴   S N Y 3 = 6 . 2 × 10 - 13 4 1 3 = 5 . 2 × 10 - 5 ∴   S M Y < S N Y 3

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