In a qualitative analysis, Bi 3+ is detected by appearance of precipitate of BiO(OH)(s) . Calculate pH when the following equilibrium exists at 298 K. BiO(OH)(s) <=> BiO+(aq) + OH-(aq) , K = 4 10 -10 (Given : 2 = 0.3010 )

1. A. 4.699
2. B. 5.286
3. C. 8.714
4. D. 9.301

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