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At \( 25^{\circ} \mathrm{C} \), the dissociation constant of a base, \( \mathrm{BOH} \), is \( 1.0 \times 10^{-12} \). The concentration of hydroxyl ions in
\( \mathrm{P} \) \( 0.01 \mathrm{M} \) aqueous solution of the base would be

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(a) \( 1.0 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1} \)
(b) \( 1.0 \times 10^{-6} \mathrm{~mol} \mathrm{~L}^{-1} \)
(c) \( 2.0 \times 10^{-6} \mathrm{~mol} \mathrm{~L}^{-1} \)
(d) \( 1.0 \times 10^{-7} \mathrm{~mol} \mathrm{~L}^{-1}(2005) \)
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