Question

Write the Kc and Kp for the following reactions. indicate whether the equilibrium system is homogeneous or heterogeneous.

a. 2KCIO3 (s) ⇌2KCI (s) + 3O2 (g)

b. 3O2(g) ⇌2O3 (g)

c. Bi2S3 (s) ⇌2Bi3+ (aq) + 3S¯² (aq)

Answer 1

a system is heterogeneous, because in the left side of equation is solid and in right is gas.

$K_c=[O_2]^3$

$K_p=P_{O_2}^3$

b.a system is homogeneous, because at left and right sides of equations are gases.

$K_c=\frac{[O_3]^2}{[O_2]^3}$

$K_p=\frac{P_{O_3}^2}{P_{O_2}^3}$

c.a system is heterogeneous, because in the left side of equation is solid and in right is aqueous.

$K_c=[S^{2-}]^3[Bi^{3+}]^2$

$K_p=1$