If the \( K_{b} \) value in the hydrolysis reaction \[ \mathrm{B}^{...

If the \( K_{b} \) value in the hydrolysis reaction
\[
\mathrm{B}^{+}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{BOH}+\mathrm{H}^{+}
\]
is \( 1.0 \times 10^{-6} \), then the hydrolysis constant of the salt would be
(1) \( 1 \times 10^{-6} \)
(2) \( 1 \times 10^{-7} \)
(3) \( 1 \times 10^{-8} \)
(4) \( 1 \times 10^{-9} \)