Consider the following buffer systems: H2CO3 ↔ HCO3- + H+ pKa = 6.4 H2PO4- ↔ HPO42- + H+ pKa = 7.2 Describe the relative amounts of the acid and conjugate base for each system at a pH of 6.98 H2CO3 (>, = or <) HCO3- H2PO4- (>, = or <) HPO42-
Added by Daniel V.
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We can use the Henderson-Hasselbalch equation to find the ratio of the acid and conjugate base for each system at a given pH. The equation is: $$ pH = pKa + \log \frac{[A^-]}{[HA]} $$ Show more…
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