Problem: Ethyl ethanoate (commonly called ethyl acetate), CH3CO2C2H5, is an important solvent used in nail polish remover, lacquers, adhesives, the manufacture of plastics, and even as a food favoring. It is produced from acetic acid and ethanol by the reaction CH3CO2C2H + C2H5OH ⇌ CH3CO2C2H5 + H2OAt 25°C, Kc = 4.10 for this reaction. In a reaction mixture, the following equilibrium concentrations were observed: [CH3CO2H] = 0.377 M, [H2O] = 0.00818 M, and [CH3CO2C2H5] = 0.924 M What was the concentration of CH3CO2H in the mixture? 

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Ethyl ethanoate (commonly called ethyl acetate), CH3CO2C2H5, is an important solvent used in nail polish remover, lacquers, adhesives, the manufacture of plastics, and even as a food favoring. It is produced from acetic acid and ethanol by the reaction 

CH3CO2C2H + C2H5OH ⇌ CH3CO2C2H5 + H2O

At 25°C, Kc = 4.10 for this reaction. 

In a reaction mixture, the following equilibrium concentrations were observed: 

[CH3CO2H] = 0.377 M, 

[H2O] = 0.00818 M, and 

[CH3CO2C2H5] = 0.924 M 

What was the concentration of CH3CO2H in the mixture? 

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