Question

1. The amino acid glycine (H2NCH2COOH) has two equilibrium constants, one for the -COOH group, andone for the -NH3 group. pKa for -COOH = 2.35and pka for -NH3 = 9.78.

H2NCH2COOH →H2NCH2COO" + H+ H2NCH2COOH + H2O → H3N+CH2COOH + OHH3N*CH2COO" + H2O List the compound(s) or ion(s) predominate in the solution at pH 2: List the compound(s) or ion(s) predominate in the solution at pH 5: List the compound(s) or ion(s) predominate in the solution at pH 10:

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