pHpka

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Assuming the COO- group pKA=2; NH2 group pKa=9
@ pH=3>pKa=2 | deprotonated COO-
@pH=3<pKa=9 | protonated NH3+

@pH=7>pKa=2 | deprotonated COO-
@pH=7<pKa=9 | protonated NH3+

@pH=9>pKa=2 | deprotonated COO-
@pH=9=pKa=9 | protonated NH3+ (to balance out - charge on COO-)
or COOH and NH2

Questions:
1. Should I approach this question with more of pH>=<pKa analysis or acidic=protonated; neutral=zwitterion; basic=deprotonated.
2. The key...

pH<=>pka