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Blood contains a buffer of carbonic acid (H 2 CO 3 ) and hydrogen carbonate ion (HCO 3 - ) that keeps the pH at

Blood contains a buffer of carbonic acid (H₂CO₃) and hydrogen carbonate ion (HCO₃^-) that keeps the pH at a relatively stable 7.40. What is the ratio of [HCO₃^-] / [H₂CO₃] in blood? K_a1 = 4.30x10^-7 for H₂CO₃.

0.0926
10.8
3.98 x 10^-8
1.71 x 10^-14

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