Question

Define reaction quotient.

Answer 1

Reaction quotient:
Reaction quotient 'Q' is defined as the ratio of product of initial concentrations of products to the product of initial concentrations of reactants under non-equilibrium conditions. For example, in the equilibrium.
aA + bB $\rightleftharpoons$ IL + mM
Let, [A], [B], [L] and [M] be the actual concentrations present before the occurance of equilibrium. These concentrations are considered as the non-equilibrium concentration conditions and the reaction quotient 'Q' is given as
$Q=\frac{\left[L{]}^1\right[M{]}^m}{\left[A{]}^a\right[B{]}^b}$