hard · MCAT chem-phys
A 0.1 M solution of the diprotic acid H₂A (pK_a1=3.0, pK_a2=7.0) is at pH 5.0.
What percentage of the total acid species is in the zwitterionic/intermediate form (HA⁻)?
- 100%
- 50%
- 98%
- 1%
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