Part A

Calculate the $pH$ in $)=4\mathrm{.}3{10}^{-7}$;$K_{a2}=(5\mathrm{.}6{10}^{-11}.$

Express your answer using two decimal places.

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Part B

Calculate the concentrations of all species present and $($:$O{H}^{-}\}$in $0\mathrm{.}017M{H}_{2}C{O}_3.$

Express your answers using two significant figures. Enter your answers numerically separated by commas.

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