Question

Select all of the correct statements about reaction quotients and equilibrium constants from the choices below.

A reaction quotient equals the equilibrium constant at equilibrium.



K changes as temperature changes, but is independent of concentrations.



If Q = K the reaction is already at equilibrium.



A reaction quotient is the same as an equilibrium constant.



The richer a reaction mixture is in product the higher its Q value is.


As a reaction approaches equilibrium its Q value rises and its K value falls until they are equal.

Answer 1

The correct options from the above statements are

consider the Equilibrium constant as "K" and Reaction Quotient as" Q"

a) A reaction quotient equals the equilibrium constant at equilibrium. True

therfore k=Q

b) K changes as temperature changes, but is independent of concentrations. True

Equilibrium constants K are not changed if we change the concentrations of things present in the equilibrium. The only thing that changes an equilibrium constant is a change of temperature

c) If Q = K the reaction is already at equilibrium. True

A comparison of Q with K indicates which way the reaction shifts and which side of the reaction is favored

If Q=K, then the reaction is already at equilibrium. There is no tendency to form more reactants or more products at this point. No side is favored and no shift occurs

[d) A reaction quotient is the same as an equilibrium constant FALSE

The main difference between K and Q is that K describes a reaction that is at equilibrium, whereas Q describes a reaction that is not at equilibrium]

e.The richer a reaction mixture is in product the higher its Q value is True

f. As a reaction approaches equilibrium its Q value rises and its K value falls until they are equal. True

ΔG = ΔGo + RT ln Q = -RT ln K + RT ln Q

At equilibrium, ΔG = 0 => Q = K