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The solubility product of B a C r O 4 is 2.4 × 1 0 - 10 M 2 . The maximum concentration of B a ( N O 3 ) 2 possible without precipitation in a 6 × 1 0 - 4 M K 2 C r O 4 solution is

Options

  1. A4 × 1 0 - 7 M
  2. B1.2 × 1 0 10 M
  3. C6 × 1 0 - 4 M
  4. D3 × 1 0 - 4 M

Correct answer

A. 4 × 1 0 - 7 M

Step-by-step solution

Precipitation occurs, if Q c > K s p . The maximum concentration of B a N O 3 3 or Ba 2 + without precipitation is obtained if Q c = K s p = B a 2 + C r O 4 2 - 2.4 × 1 0 - 10 M 2 = Ba 2 + 6 × 1 0 - 4 M or B a 2 + = 2.4 × 1 0 - 10 M 2 6 × 1 0 - 4 M = 0.4 × 1 0 - 6 M = 4 × 1 0 - 7 M .

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