Calculate the ratio of the molarities of CO₃²^- and HCO₃^-ions required to achieve buffering at pH = 9.0 .For H₂CO₃,PK_a1 = 6.37,And pK_a2 = 10.00.

Name: Calculate the ratio of the molarities of CO 3 2 - and HCO 3 - ions required to achieve buffering at pH = 9.0 .For H 2 CO 3 ,PK a1 = 6.37,And pK a2 = 10.00.
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Question

Quizplus · Accepted Answer

Using the Henderson-Hasselbalch equation for the second dissociation, pH = pKa2 + log([CO3^2-]/[HCO3^-]), we find the ratio [CO3^2-]/[HCO3^-] = 10^(pH - pKa2) = 10^(9.0 - 10.0) = 0.1.

Calculate the Ratio of the Molarities of CO32- and HCO3-ions

Calculate the Ratio of the Molarities of CO₃²^- and HCO₃^-ions