Vruou=150.34,5/100=51,75ml
mruou=51,75.0,8=41,4g
n(C2H5OH)=41,4/46=0,9mol
Số mol tinh bột n=0,9/2n=0,45/n mol
Khối lượng tinh bột là m=162n.0,45/n =72,9g
Hiệu suất H=72,9/162.100%=45%
\(V_{C_2H_5OH}=150\cdot0.345=51.75\left(ml\right)\)
\(m_{C_2H_5OH}=51.75\cdot0.8=41.4\left(g\right)\)
\(\Rightarrow n_{C_2H_5OH}=\dfrac{41.4}{46}=0.9\left(ml\right)\)
\(\left(C_6H_{10}O_5\right)_n\rightarrow nC_6H_{12}O_6\rightarrow2nC_2H_5OH\)
\(\dfrac{0.45}{n}.................................0.9\)
\(m_{tb}=\dfrac{0.45}{n}\cdot162n=72.9\left(g\right)\)
\(H\%=\dfrac{72.9}{162}\cdot100\%=45\%\)