\(2C_2H_5OH+2Na\rightarrow2C_2H_5Na+H_2\)
\(2C_3H_7OH+2Na\rightarrow2C_3H_7Na+H_2\)
Ta có:
\(n_{H2}=\frac{4,2}{22,4}=0,1875\left(mol\right)\)
Gọi \(\left\{{}\begin{matrix}n_{C2H5OH}:a\left(mol\right)\\n_{C3H7OH}:b\left(mol\right)\end{matrix}\right.\)
\(\left\{{}\begin{matrix}0,5a+0,5b=0,1875\\46a+60b=18,3\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}a=0,03\\b=0,075\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}m_{C2H5OH}=\frac{0,3.46}{18,3}.100\%=75,41\%\\\%m_{C3H7OH}=100\%-75,41\%=24,59\%\end{matrix}\right.\)