give me the difference b/w Qc,Kc,Qp,Kp - Chemistry - Equilibrium

Question

give me the difference b/w Qc,Kc,Qp,Kp ??

Pankaj Singh · Accepted Answer

K is the equilibrium constant while Q is reaction quotient The two quantities can be expressed in the form of concentrations of the reactants (Qc ,Kc) and products as well as in the form of partial pressure of reactant and products(Qp,Kp) For given reaction

and $Q_{p} = \frac{[P_{C}]^{c} [{P_{D}]}^{d}}{[P_{A}]^{a} [{P_{B}]}^{b}}$ Reaction Quotient Q c - It is the function of the activities or concentrations of the species involved in a chemical reaction For a general reaction,

Thus it is the ratio of product of concentrations of the products and product of concentrations reactants, each concentration raised to the power equal to stoichiometric coefficient in the balanced equation at any stage of reaction Equilibrium constant K c- The ratio of product of concentrations of the products and product of concentration reactants, each concentration raised to the power equal to stoichiometric coefficient in the balanced equation at only equilibrium stage of reaction Reaction Quotient Q c pridicts the direction of reaction When Q c < K c : Reaction proceeds in forward direction Q c > K c : Reaction proceeds in backward direction Q c = K c : Reaction is in equilibrium