Gọi \(\left\{{}\begin{matrix}n_{C_6H_5OH}=a\left(mol\right)\\n_{CH_3OH}=b\left(mol\right)\end{matrix}\right.\left(đk:a,b>0\right)\)
\(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
PTHH:
\(C_6H_5OH+Na\rightarrow C_6H_5ONa+\dfrac{1}{2}H_2\)
a-------------------------------------->0,5a
\(CH_3OH+Na\rightarrow CH_3ONa+\dfrac{1}{2}H_2\)
b-------------------------------------->0,5b
Theo bài ra, ta có hệ: \(\left\{{}\begin{matrix}94a+32b=22\\0,5a+0,5b=0,15\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}a=0,2\\b=0,1\end{matrix}\right.\left(TM\right)\) hay \(\left\{{}\begin{matrix}n_{C_6H_5OH}=0,2\left(mol\right)\\n_{CH_3OH}=0,1\left(mol\right)\end{matrix}\right.\)
\(\rightarrow\left\{{}\begin{matrix}\%m_{C_6H_5OH}=\dfrac{0,2.94}{22}.100\%=85,45\%\\\%m_{CH_3OH}=100\%-85,45\%=14,55\%\end{matrix}\right.\)
b) Trong 11 gam hỗn hợp có:
\(\left\{{}\begin{matrix}n_{C_6H_5OH}=\dfrac{11}{22}.0,2=0,1\left(mol\right)\\n_{CH_3OH}=\dfrac{11}{22}.0,1=0,05\left(mol\right)\end{matrix}\right.\)
PTHH: \(C_6H_5OH+3HNO_3\xrightarrow[H_2SO_4\left(đặc\right)]{}3H_2O+C_6H_2OH\left(NO_2\right)_3\)
0,1--------------------------------------------->0,1
\(\rightarrow m_{C_6H_2OH\left(NO_2\right)_3}=0,1.229=22,9\left(g\right)\)
tham khảo:| Cộng đồng Học sinh Việt Nam - HOCMAI Forum
