Cho các sơ đồ phản ứng: [Glyxin mathop to limits^{ + NaOH} X mathop to limits^{ + HCl{ kern 1pt} { rm{d}}u} Y ] (1) [Glyxin mathop to limits^{ + HCl} Z mathop to limits^{ + NaOH{

* Hướng dẫn giải

*Sơ đồ (1):

\[{H_2}NC{H_2}COOH\mathop \to \limits^{ + NaOH} {H_2}NC{H_2}COONa\left( X \right)\mathop \to \limits^{ + HCl{\kern 1pt} {\rm{d}}u} Cl{H_3}NC{H_2}COOH\left( Y \right)\]

PTHH:

H₂NCH₂COOH + NaOH → H₂NCH₂COONa + H₂OH₂NCH₂COONa + HCl → ClH₃NCH₂COOH + NaCl*Sơ đồ (2):

\[{H_2}NC{H_2}COOH\mathop \to \limits^{ + HCl} Cl{H_3}NC{H_2}COOH\left( Z \right)\mathop \to \limits^{ + NaOH{\kern 1pt} {\rm{d}}u} {H_2}NC{H_2}COONa\left( T \right)\]

PTHH:

H₂NCH₂COOH + HCl → ClH₃NCH₂COOH ClH₃NCH₂COOH + NaOH → H₂NCH₂COONa + H₂O + NaCl

Đáp án cần chọn là: C