Gọi \(\left\{{}\begin{matrix}n_{\text{phenol}}:x\left(mol\right)\\n_{\text{etanol }}:y\left(mol\right)\end{matrix}\right.\)
\(2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\)
\(2C_6H_5OH+2Na\rightarrow2C_6H_5ONa+H_2\)
Giải hệ PT:
\(\left\{{}\begin{matrix}94x+46y=28,76\\\frac{1}{2}x+\frac{1}{2}y=0,25\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,12\\y=0,38\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}m_{C6H5OH}=0,12.94=11,28\left(g\right)\\m_{C2H5OH}=0,38.46=17,48\left(g\right)\end{matrix}\right.\)
\(PTHH:C_6H_5OH+NaOH\rightarrow C_5H_5ONa+H_2O\)
\(n_{NaOH}=n_{C6H5OH}=0,0776\left(mol\right)\)
\(\Rightarrow V_{NaOH}=\frac{0,776}{0,2}=0,388\left(l\right)=388\left(ml\right)\)
