Chọn đáp án A
$2C_2H_5OH + 2Na \to 2C_2H_5ONa + H_2$
$CH_3COOH + NaOH \to CH_3COONa + H_2O$
$HCOOH + NaOH \to HCOONa + H_2O$
$CH_3COOC_2H_5 + NaOH \to CH_3COONa + C_2H_5OH$
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