Question

56.
One mole of ethanol is treated with one mole of ethanoic acid at 25°C.
One-fourth of the acid changes into ester at equilibrium. Find kc.
a. 1/9
b. 4/9
c. 9
d. 9/4
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Answer 1

Answer:

[A] 1/9

Explanation:

CH3COOH + C2H5OH -<-------------->CH3COOC2H5 + H2O

Kc = [CH3COOC2H5] [ H2O]/[CH3COOH]  [C2H5OH]

KC=[ 1/4X1/4]/ [3/4X3/4 = 1/9

ANS [A] 1/9