Question

Consider the following reaction. A(aq) <---> 2B(aq)? Kc = 1.80 x 10^-6 at 500K If a 4.40 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?

Answer 1

A(aq) <------------------> 2B(aq)

4.40                                  0

4.4-x                                2x

Kc = (2x)^2/4.4 - x

1.80 x 10^-6 = 4x^2/4.4-x

x = 0.00141

[B] = 2x = 2 x 0.00141= 0.0028 M

concentration of B at equilibrium = 0.0028 M