For a solution of weak triprotic acid \( \mathrm{H}_{3} \mathrm{~A}...

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For a solution of weak triprotic acid \( \mathrm{H}_{3} \mathrm{~A}\left(\mathrm{~K}_{\mathrm{a}_{1}}\mathrm{K}_{\mathrm{a}_{2}}, \mathrm{~K}_{\mathrm{a}_{3}} ; \mathrm{K}_{\mathrm{a}_{2}}=10^{-8} ; \mathrm{K}_{\mathrm{a}_{3}}=10^{-13}\right),\left[\mathrm{A}^{3-}\right]=10^{-17} \mathrm{M} \). Determine \( \mathrm{pH} \) of solution. Report your answer as ' 0 ', if you find data insufficient.
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