For the reaction A(aq) + B(aq) C(aq) K_c equaled 1. Assume that the initial conc

Question

For the reaction A(aq) + B(aq) C(aq) K_c equaled 1. Assume that the initial concentrations are [A]_init = 0 M. [B]_init = 0 M, and [C]_init = 100 M. (a) Calculate the value of the reaction quotient Q. (b) Describe what net reaction would occur and how the concentrations of A, B, and C would change (ie. increase, decrease or stay the same) to reach equilibrium. (c) Assume you have an equilibrium mixture of [A], [B], and [C] at 298K and that the reaction is endothermic. i) What would happen to the concentration of C in this mixture if the temperature is increased. ii) And with this change in [C] what would happen to .he value of K_c?

Explanation / Answer

3) A(aq) + B(aq) ------- > C(aq)

<--------

Q is based on initial concentration

Kc is based on concentration on equilibrium

a)Initial concentration , [A] = 0 , [B]= 0 , [C] = 10M

Q = [C]init/[A]init[B]init

=10/0×0 = infinity

b) The reaction proceed reverse

Concentration of C decrease

Concentration of A increase

Concentration of B increase

c). i) The reaction proceed farward and the concentration of C will increase as the system absorb the heat

ii) As the concentration of C increase Kc value increase as.

Kc = [C]eq/[A]eq [B]eq

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