Ethyl accetate is formed by the reaction between ethanol and acetic acid and the equilibrium is represented as :
` CH_(3) COOH (l) + C_(2) H_(5) OH (l) hArr CH_(3) COOC_(2) H_(5)(l) + H_(2)O (l).`

Explanation

(i) ` Q_(c) = ([CH_(3) COOC_(2) H_(5)][H_(2)O])/([CH_(3) COOH ] [C_(2) H_(5) OH]) `
` {:((ii),CH_(3)COOH,+,C_(2)H_(5)OH,hArr,CH_(3)COOC_(2)H_(5),+,H_(2)O),("Intial",1*00"mol",,0*180 "mol",,,,),("At eqm",1-0*171,,0*180-0*171,,0*171"mol",,0*171 "mol"),(,=0*829 "mol",,=0*009"mol",,,,),("Molar concs.",0*829//V,,0*009 //V,,0*171//V,,0*171//V):} `
` K_(c) = ([CH_(3) COOC_(2)H_(5)][H_(2)O])/([CH_(3)OOH][C_(2)H_(5)OH] )=((0*171//V)(0*171//V))/((0*829//V)(0*009//V))=3*92`
` {:((iii),CH_(3)COOH,+,C_(2)H_(5)OH,hArr,CH_(3)COOC_(2)H_(5),+,H_(2)O),("Intial",1*000 "mol",,0*500"mol",,,,),("After time t",1-0*214,,0*500-0*214,,0*214,,0*214),(,=0*786 "mol",,= 0*286 "mol",,,,):}`
Reaction quotient ` (Q_(c))=((0*214//V)(0*214//V))/((0*786//V)(0*286//V))=0*204`
As `Q_(c) != K_(c)` , equilibrium has not been attained .