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NTA Abhyas NEET2020ChemistryIonic EquilibriumPractice

What minimum concentration of S O 4 2 - is required to precipitate B a S O 4 from the solution containing 1.0 × 1 0 - 4 m o les of B a 2 + ? (Given K s p for B a S O 4 is 4 × 1 0 - 10 )

Options

  1. A2 × 1 0 - 3 M
  2. B2 × 1 0 - 7 M
  3. C4 × 1 0 - 6 M
  4. D4 × 1 0 - 10 M

Correct answer

C. 4 × 1 0 - 6 M

Step-by-step solution

B a S O 4 ⇌ B a 2 + + S O 4 2 - K s p = [ B a 2 + ] × [ S O 4 2 - ] K s p = S 2 ⇒ S = K s p ; 4 × 1 0 - 10 = [ 1 × 1 0 - 4 ] × [ S O 4 2 - ] [ S O 4 2 - ] = 4 × 1 0 - 10 1 × 1 0 - 4 = 4 × 1 0 - 6 .

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