Gọi \(\left\{{}\begin{matrix}V_{\text{ rượu}}=a\\V_{\text{nước }}=b\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}m_{C2H5OH}=0,8a\\m_{H2O}=b\end{matrix}\right.\Rightarrow n_{C2H5OH}=\frac{0,8a}{46};n_{H2O}=\frac{b}{18}\)
\(2Na+2H_2O\rightarrow2NaOH+H_2\)
\(2Na+2C_2H_5OH\rightarrow2C_2H_5OH+H_2\)
\(n_{H2O}+n_{C2H5OH}=\frac{0,8a}{46}+\frac{b}{18}=2n_{H2}=2.\frac{1,52}{2}=1,52\)
Giải hệ PT: \(\Rightarrow\left\{{}\begin{matrix}a=76,63\\b=3,37\end{matrix}\right.\)
\(\Rightarrow D_r=95,8^o\)
\(\)