Question

x1---->CH3COOH--->этилацетат--->x2----(NaOH,t)--->x3--->этин

Answer 1

CH3COOK + HCl --> CH3COOH + KCl
CH3COOH + C2H5OH -->(H2SO4, t) CH3COOC2H5 + H2O
CH3COOC2H5 + NaOH --> CH3COONa + C2H5OH
CH3COONa + NaOH --> CH4 + Na2CO3
2CH4 -->(t) C2H2 + 3H2