Calculate the concentration of bicarbonate ion,HCO₃^-,in a 0.010 M H₂CO₃ solution that has the stepwise dissociation constants K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11. A) 6.6 × 10^-⁵ M B) 4.3 × 10^-7 M C) 4.3 × 10^-⁹ M D) 5.6 × 10^-11 M

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Quizplus · Accepted Answer

The concentration of bicarbonate ion in a 0.010 M H2CO3 solution can be approximated using the first dissociation constant (Ka1 = 4.3 × 10^-7) because the second dissociation step (Ka2 = 5.6 × 10^-11) contributes negligibly to the overall concentration of bicarbonate ions. The concentration of bicarbonate ions is approximately equal to the square root of the product of the concentration of H2CO3 and Ka1, which is sqrt(0.010 M * 4.3 × 10^-7) = 6.6 × 10^-5 M.

Calculate the Concentration of Bicarbonate Ion,HCO3-,in a 0

Calculate the Concentration of Bicarbonate Ion,HCO₃^-,in a 0