If the $K_b$ value in the hydrolysis reaction $B^{+} + H_2O \rightleftharpoons BOH + H^{+}$ is $1.0 \times 10^{-6}$,then the hydrolysis constant of the salt would be

  • A
    $1.0 \times 10^{-6}$
  • B
    $1.0 \times 10^{-7}$
  • C
    $1.0 \times 10^{-8}$
  • D
    $1.0 \times 10^{-9}$

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