Dẫn hơi C2H5OH qua ống đựng CuO nung nóng thu được hỗn hợp X gồm anđehit, H2O

      \(C_{2}H_{5}OH + \frac{1}{2}O_{2} \xrightarrow[]{ \ xt \ }CH_{3}CHO+H_{2}O\)
pứ:      a                                             a                  a
dư:      b
\(X:\left\{\begin{matrix} CH_{3}CHO: \ a \\ H_{2}O : \ a \ \ \ \ \ \ \ \ \\ C_{2}H_{5}OH_{du}: \ b \end{matrix}\right.\)
\(\begin{matrix} H_{2}O \\ a \end{matrix}\begin{matrix} + Na \xrightarrow[]{ \ \ \ \ } NaOH \ + \\ \ \end{matrix}\begin{matrix} \ \dfrac{1}{2}H_{2} \\ \dfrac{a}{2} \end{matrix}\)
\(\begin{matrix} C_{2}H_{5}OH \\ b \end{matrix} \begin{matrix} + Na \xrightarrow[]{ \ \ \ \ } C_{2}H_{5}ONa \ + \ \\ \ \end{matrix} \begin{matrix} \dfrac{1}{2} H_{2} \\ \dfrac{b}{2} \end{matrix}\)
\(\\ n_{H_{2}}=\frac{3,36}{22,4}= 0,15 \ mol \\ \frac{a}{2}+\frac{b}{2}=0,15 \Rightarrow a + b = 0,3 \\ m_{C_{2}H_{5}OH \ (bd)} = (a + b).46 = 13,8 \ (g)\)