$A$ solution of $Na_2S_2O_3$ is standardized iodometrically against $0.167 \ g$ of $KBrO_3$ where $BrO_3^-$ changes to $Br^-$. This process requires $45 \ mL$ of the $Na_2S_2O_3$ solution. What is the strength of the $Na_2S_2O_3$ in $N$?
$[Mw \text{ of } KBrO_3 = 167]$

  • A
    $\frac{2}{15} \ N$
  • B
    $\frac{2}{30} \ N$
  • C
    $\frac{1}{30} \ N$
  • D
    $\frac{1}{60} \ N$

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