Consider the following reaction: A(g)B(g)+C(g) Find the equilibrium concentratio

Question

Consider the following reaction: A(g)B(g)+C(g) Find the equilibrium concentrations of A, B, and C for each of the following different values of Kc. Assume that the initial concentration of A in each case is 1.0 M and that the reaction mixture initially contains no products. Make any appropriate simplifying assumptions.

Part B

Kc= 1.4×102 Express your answer using two significant figures. Enter your answers numerically separated by commas.

Part C

Kc= 1.8×105 Express your answer using two significant figures. Enter your answers numerically separated by commas.

Explanation / Answer

Part B

                 A(g) B(g) + C(g)

initial          1.0 M     o M       0 M

equilibrium     1.0-x       x        x

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

Part B,

( 1.4*10^(-2)) = (x^2/(1.0-x))

x = 0.1153 M

at equilibrium,

[B] = 0.1153 M

[C] = 0.1153 M

[A] = 1.0-0.1153 = 0.8847 M

Part C

                 A(g) B(g) + C(g)

initial          1.0 M     o M       0 M

equilibrium     1.0-x       x        x

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

Part B,

( 1.8*10^(-5)) = (x^2/(1.0-x))

x = 0.00423 M

at equilibrium,

[B] = 0.00423 M

[C] = 0.00423 M

[A] = 1.0-0.00423 M = 0.99577 M

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