В
схеме превращений: C2H5OH + X→C2H5COOC2H5 +Y
→C2H5COONa реагентами «Х» и «Y» являются:



1) X – C2H5CHO, Y – NaOH


2) X – C3H7OH, Y – Na2CO3


3) X – C3H8, Y – HCOONa


4) X – C2H5COOH, Y – NaOH 
И почему
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