The equation for aerobic production of acetic acid from ethanol is: C_2H_5OH + O_2 \rightarrow CH_3CO_2H + H_2O Acetobacter aceti bacteria are added…
The equation for aerobic production of acetic acid from ethanol is:C2H5OH+O2→CH3CO2H+H2OAcetobacter aceti bacteria are added to vigorously-aerated medium containing 10g.l−1ethanol. After some time, the ethanol concentration is 2g.l−1and 7.5g.l−1of acetic acid is produced. What is the observed yield (YOing.g−1) and theoretical yield (YTing.g−1) of acetic acid from ethanol?
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Correct Answer: Option D
Explanation
Acetic acid (vinegar) production by Acetobacter aceti:C2H5OH+O2→CH3COOH+H2O. Data: Ethanol consumed =10−2=8 g/L; Acetic acid produced =7.5 g/L. Observed yield:YO=Ethanol consumedAcetic acid produced=87.5=0.9375≈0.94 g/g. Theoretical yield: From stoichiometry,Mr(C2H5OH)=46 g/mol;Mr(CH3COOH)=60 g/mol.YT=4660=1.304≈1.3 g acetic acid / g ethanol. Answer:YO=0.94 g/g,YT=1.3 g/g.