76. Alanine, H2NCH(CH3)CO2H, has Ka = 4.5 × 10–3and Kb = 7.4 × 10–5. Which species has the highest concentration in water(pH=7.0)?
(A) H2NCH(CH3)CO2H
(B) +H3NCH(CH3)CO2H
(C) H2NCH(CH3)CO2–
(D) H2NCH(CH3)CO2H2+
(E)+H3NCH(CH3)CO2–

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