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Using the Gibbs energy change, Δ G ° = + 63.3 kJ , for the following reaction, A g 2 C O 3 → 2 A g + ( a q ) + C O 3 2 - ( a q ) the K s p of A g 2 C O 3 ( s ) in water at 25 o C is ( R = 8.314 J K - 1 m o l - 1 ) Given: 10 0.91 ≅ 8

Options

  1. A7.9 × 1 0 - 2
  2. B8.0 × 1 0 - 12
  3. C2.9 × 1 0 - 3
  4. D3.2 × 1 0 - 26

Correct answer

B. 8.0 × 1 0 - 12

Step-by-step solution

ΔG o = − 2.303   RT   log   K sp 63.3 × 1000 = - 2.303 × 8.314 × 298 log ⁡ K s p log ⁡ K s p = - 11.09 K s p = 1 0 - 11.09 = 8 × 1 0 - 12

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