In an experiment starting with 1 mole C 2 H 5 OH, 1 mole CH 3 COOH and 1 mole of water, the equilibrium mixture on analysis shows that 54.3% of the acid is esterified. Calculated K c .

							
                                                  C2H5OH + CH3COOH ---------------> C2H5CH3COO + H2O
INITIAL MOLES:                                 1              1                                      0              1
EQUILIBRIUM MOLES :           1-(54.3*1)/100    1-(54.3*1)/100        0+(54.3*1)/100    1+(54.3*1)/100
* SIGN DENOTES MULTIPLICATION
SINCE THEY ARE TELLING THAT ONLY 54.3% OF ACID IS CONVERTED THIS MEANS THAT 54.3% OF INITIAL MOLES IS CONVERTED INTO ESTER MEANS  (54.3*1)/100 MOLES IS REMOVED . AND THEN ACCORDING TO STICHIOMETERY SINCE ALL THE COEEFICIENTS ARE 1 THEREFORE THE NO. OF MOLES OF ACID WHICH IS CONVERTED INTO ESTER THAN MANY MOLES WILL ALSO BE REMOVED FROM  C2H5OH .
  THEREFORE KC= [H2O]1 [C2H5CH3COO]1
                       ----------------------
                        [CH3COOH ]1 [C2H5OH]1      [     ]  SIGN DENOTES CONCENTRATION MEANS MOLES / VOLUME 
                
                       KC = [{1+(54.3*1)/100}/V] [{0+(54.3*1)/100}/V]
                        ------------------------------------------------
                         [{1-(54.3*1)/100}/V]  [{1-(54.3*1)/100}/V]   
 
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