Problem- Phosphate buffers are integral in the human body, by regulating the pH of intracellular fluids at pH 7.1-7.2. What is the concentration of H2PO4- to HPO42- in an intracellular fluid at pH = 7.15? Ka = 6.23 x 10^-8. (Please illustrate the math)
a. 0.5
b. 3.5
c. 1.1
d. 2.1
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