pH of polyprotic acid

Chemistry Level 2

Find the pH of \(1.0\) M \(\text{NaHCO}_{3},\) using the following acid ionization constants: \[\begin{align} K_{a1} &= \frac{[\text{HCO}_{3}^{-}][\text{H}_{3}\text{O}^{+}]}{[\text{H}_{2}\text{CO}_{3}]}= 4.3 \times 10^{-7}\\ K_{a2} &= \frac{[\text{CO}_{3}^{2-}][\text{H}_{3}\text{O}^{+}]}{[\text{HCO}_{3}^{-}]}= 4.8 \times 10^{-11}. \end{align}\]

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