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The Solubility of A B 2 is 0 .05 g per 100 mL at 25 o C . Calculate K sp of A B 2 at 25 o C? [Atomic mass of A = 20 amu, atomic mass of B = 40 amu ]

Options

  1. A1 0 - 3
  2. B5 × 1 0 - 7
  3. C1 0 - 6
  4. D5 × 1 0 - 3

Correct answer

B. 5 × 1 0 - 7

Step-by-step solution

= 0 .05 g/100 mL = 0 .5 g/L = 0.5 100 = 5 × 10 − 3   mol/L K s p = 4 s 3 = 4 × 5 × 1 0 - 3 3 = 5 × 1 0 - 7

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