Q.

At a certain temperature the equilibrium constant Kc is 0.25 for the reaction A2(g)+B2(g)⇌C2(g)+D2(g) If we take 1 mole of each of the four gases in a 10 litre container, what would be equilibrium concentration of A2(g)?

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0.331 M

0.033 M

0.133M

1.33M

answer is C.

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Detailed Solution

Qc=1×11×1=1 because QC>KC so reaction will proceed in backward direction A2(g) + B2(g) ⇌ C2(g)+D2(g) eq. Conc.; 1+x10 1+x10 1-x10 1-x10 0.25=1-x1021+x102⇒x=0.333 A2(g)=1+x10=1.33310=0.133

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