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In an Experiment,100 ML of a 0 $\times$ 10^-³ and 8 $\times$

Question 29

Multiple Choice

In an experiment,100 mL of a 0.1 M solution of methionine is titrated using 0.1 M NaOH.Using this information,along with the titration curve shown,which of the following statements is NOT correct?
$In an experiment,100 mL of a 0.1 M solution of methionine is titrated using 0.1 M NaOH.Using this information,along with the titration curve shown,which of the following statements is NOT correct? A) At low pHs,the majority of the amino acid present is fully protonated. B) The pKa of the protonated amine group seems to be a little greater than 10. C) When the pH reaches the physiological value of 7.4,the carboxylic acid group is essentially deprotonated. D) The Ka of the -COOH group appears to be between 5 \times 10-3 and 8 \times 10-3. E) Methionine appears to have a neutral side group,as there seem to be two equivalence points evident on the titration curve.$

A) At low pHs,the majority of the amino acid present is fully protonated.
B) The pK_a of the protonated amine group seems to be a little greater than 10.
C) When the pH reaches the physiological value of 7.4,the carboxylic acid group is essentially deprotonated.
D) The K_a of the -COOH group appears to be between 5 $\times$ 10^-³ and 8 $\times$ 10^-³.
E) Methionine appears to have a neutral side group,as there seem to be two equivalence points evident on the titration curve.