Chemical EquilibriumHard

Question

When alcohol (C2H5OH (l)) and acetic acid (CH3COOH (l)) are mixed together in equimolar ratio at 27oC , 33% of each is converted into ester. Then the KC for the equilibrium
          C2H5OH(l) + CH3COOH (l) ⇋  CH3COOC2H5 (l) + H2O(l).

Options

A.4
B.1/4
C.9
D.1/9

Solution

C2H5OH (l) + CH3COOH (l) ⇋  CH3COOC2H5 (l) + H2O (l).
   a                a                      0                 0
a  0.33a        a - 0.33a        0.33a           0.33a
KC = = KC = 1/4.

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