In a carbonic acid buffer system, the total acid concentration is 0.55 M and the pH is 10.0. Calculate the concentration of each carbonate species, H2CO3, HCO3- and CO32-. The relevant Ka’s are K1 = 4.2 x 10-7 and K2 = 4.8 x 10-11.

In a carbonic acid buffer system, the total acid concentration is 0.55 M and the pH is 10.0. Calculate the concentration of each carbonate species, H2CO3, HCO3- and CO32-. The relevant Ka’s are K1 = 4.2 x 10-7 and K2 = 4.8 x 10-11.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter19: Applications Of Standard Electrode Potentials

Section: Chapter Questions

Problem 19.13QAP

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Question

In a carbonic acid buffer system, the total acid concentration is 0.55 M and the pH is 10.0. Calculate the concentration of each carbonate species, H₂CO₃, HCO₃^- and CO₃^2-. The relevant K_a’s are K₁ = 4.2 x 10^-7 and K₂ = 4.8 x 10^-11.

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