A. At what pH are about 1/2 of the carboxyl groups ionized? pH = B. Where does the amino acid have a net charge of +1? below pH 2.34 at pH = 2.34 at pH = 6.01 at pH = 9.69 above pH 9.69 C. At what point has enough base been added to react with 1/2 of the COOH groups? 1/2 of COOH reacted = equivalents OH− when 1/2 of COOH has reacted, the pH = D. At which pH value does the amino acid have the best buffering capacity? 1.53 10.5 2.34 6.01 3.00 9.00 E. What is the pI (isoelectric point)? pI =

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization.a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution.part bcalculate the percent ionization of ha in a 0.010 m solution