Consider a buffered solution consisting of H₂CO₃ and HCO₃^- where the pKa = 6.4.At pH = 6.4,which of the following is true? A)[H₂CO₃] [HCO₃^-] B)[H₂CO₃]

Question

Consider a buffered solution consisting of H₂CO₃ and HCO₃^- where the pKa = 6.4.At pH = 6.4,which of the following is true? A)[H₂CO₃] > [HCO₃^-] B)[H₂CO₃]< [HCO₃^-] C)[H₂CO₃] = [HCO₃^-] D)[H₂CO₃] < [CO₃^-2]

Quizplus · Accepted Answer

At pH = pKa, the concentrations of the acid and its conjugate base are equal. Therefore, [H₂CO₃] = [HCO₃^-]. The other options are not true because they either incorrectly show the acid form to be greater than the conjugate base or vice versa.

Consider a Buffered Solution Consisting of H2CO3 and HCO3- Where

Consider a Buffered Solution Consisting of H₂CO₃ and HCO₃^- Where