\((C_6H_{10}O_5)_n + nH_2O \xrightarrow{H^+} nC_6H_{12}O_6\\ C_6H_{12}O_6 \xrightarrow{men\ rượu,30^0-35^o}2CO_2 + 2C_2H_5OH\)
Theo PTHH :
\(n_{C_6H_{12}O_6} = n.n_{tinh\ bột\ pư} = n.\dfrac{100}{162n}.80\%= \dfrac{40}{81}mol\)
\(n_{C_6H_{12}O_6\ pư} = \dfrac{40}{81}.75\% = \dfrac{10}{27}mol\\ \Rightarrow n_{C_2H_5OH} = 2n_{C_6H_{12}O_6\ pư} = 2. \dfrac{10}{27}= \dfrac{20}{27}mol\\ \Rightarrow m_{C_2H_5OH} = \dfrac{20}{27}.46 = 34,074(kg)\)