CH2CH3COOCH2CH3+NaOH → HCOOCH2CH3+H2O →

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CH2CH3COOCH2CH3+NaOH → HCOOCH2CH3+H2O →

CH2CH3COOCH2CH3+NaOH → HCOOCH2CH3+H2O →
  CH2CH3COOCH2CH3+NaOH →
 HCOOCH2CH3+H2O → 

CH2CH3COOCH2CH3+NaOH → HCOOCH2CH3+H2O →
第一个生成CH3COONa和CH3CH2OH
第二个生成HCOOH和CH3CH2OH
这是酯类的水解 第一个是碱性环境地 不可逆转 第二个是酸性环境 可逆

CH2CH3COOCH2CH3+NaOH →CH3CH2COOA+CH3CH2OH HCOOCH2CH3+H2O →HCOOH+CH3CH2OH

CH3CH2COONa+CH3CH2OH
HCOOH+CH3CH2OH