Identify the structure of alanine when pH is 11 .

Step-by-step solution

Alanine is an amino acid with an acidic carboxyl group and a basic amino group. In a highly basic medium at pH 11 , the solution provides a large concentration of OH ^- ions. Both the carboxyl group and the protonated amino group will lose their protons. The - COOH group deprotonates to form - COO ^- , and the - NH ₃^+ group deprotonates to form - NH ₂ . Thus, alanine exists as an anion with the structure NH ₂ -CH(CH ₃ )-COO ^- . Answer: NH ₂ -CH(CH ₃ )-COO ^-