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Grade 12th passPhysical Chemistry

Equilibrium constant of the reaction A+B ----- C+D is 1/3. How many moles of A must be mixed with 3 moles of B to yield at the equilibrium 2 mole of C. The volume of the vessel is 2 litres

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Answer is 14 moles

Profile image of yohib ahmed
7 Years agoGrade 12th pass
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1 Answer

Profile image of Pooja
7 Years ago
  

Let the required moles be X

A  +       B ➡️     C   +    D
X/2        3/2              0            0     initial
(X-2)/2    (3-2)/2      2/2       2/2    equilibrium

Keq = [C][D]/[A][B]
1/3 = [1][1]/[(X-2)/2][1/2]
3 = (X-2)/4
X=14 moles