$\underbrace{\text{C}{{\text{H}}_{3}}\text{COOCH = C}{{\text{H}}_{2}}}_{\text{X}}\text{ + NaOH }\to \text{ }\underbrace{\text{C}{{\text{H}}_{3}}\text{COONa}}_{\text{Y}}\text{ + }\underbrace{\text{C}{{\text{H}}_{3}}\text{CHO}}_{\text{Z}}$;

CH₃CHO + AgNO₃ + NH₃ => $\underbrace{\text{C}{{\text{H}}_{3}}\text{COON}{{\text{H}}_{4}}}_{\text{T}}$;

CH₃COONH₄ + NaOH => CH₃COONa + NH₃ + H₂O;