Question

For a reaction aA + bB → cC + dD, which is not in equilibrium the QC is given as __________

(a) [A]^a[B]^b/[C]^c[D]^d

(b) [C]^c[D]^d/[A]^a[B]^b

(c) [A][B]/[C][D]

(d) [C][D]/[A][B]

The question was asked in unit test.

My doubt is from Applications of Equilibrium Constants topic in division Equilibrium of Chemistry – Class 11

Answer 1

Right choice is (b) [C]^c[D]^d/[A]^a[B]^b

To explain I would say: A very basic reaction like aA + bB → cC + dD, where the capital letters represent the compounds or molecules and the small letters are the coefficients of them the reaction quotient QC, is given by [C]^c[D]^d/[A]^a[B]^b.