Question

For alanine, the pKa(COOH)=2.3, pKa(NH₃)=9.7



Select the true answers by referring to the structure of alanine, shown above at pH= 7.0. Please note the pH at which the titration was started.
True False  Alanine has a buffer region near pH 10.
True False  At point B, the net charge is +1.
True False  At point B, the net charge is +0.5
True False  At the isoelectric point, C, pH = 6.0
True False  Alanine has a buffer region near pH 6.
True False  At the isoelectric point, B, pH = 2.3
True False  At the isoelectric point, C, pH = 9.7
True False  At the isoelectric point, D, pH = 9.7
True False  Alanine has a buffer region near pH 2.5.
True False  At point B, the net charge is 0.
True False  At the isoelectric point, B, pH = 6.0

pKa2 9.7 pKal 2.3 pH HRN CH3 The structure of alanine at pH-7.0 Equiv. of Base АФ 0

Answer 1