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Question

The solubility of A2X5 is x mol dm3. Its solubility product is:
  1. 36x6
  2. 64×104x7
  3. 126x7
  4. 1.25×104x7

A
64×104x7
B
126x7
C
1.25×104x7
D
36x6
Solution
Verified by Toppr

Let the solubility be S.
As2X32As5++5X22S5S
Solubility product is
Ksp=[As5+]2×[S2]5
Let [As2S5]=S,[As5+]=2S,[S2]=5SKsp=(2S)2×(5S)5=4S2×3125S5=12500S7

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