$50\ ml$ of $0.02\ M$ $NaHSO_4$ is mixed with $50$ $ml$ of $0.02\ M\ Na_2SO_4$. Calculate $pH$ of the resulting solution.$[pKa_2 (H_2SO_4) = 2]$

  • A

    $2$

  • B

    $2 - \,\log \,\left( {\sqrt 2 } \right) - 1$

  • C

    $2 + \,\log \,\left( {\sqrt 2 } \right) + 1$

  • D

    $1.7$

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