If a 5.305.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?

Question

Consider the reaction.

A(aq)↽−−⇀2B(aq) 𝐾=2.03×10^-6 at 500 K

If a 5.305.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?

Answer 1

A(aq) <===> B(aq) K = 2.03x10^-6

5.30..............0.......Initial

-x.................+x......Change

5.30-x...........x.......Equilibrium

K = [B] / [A]

2..03x10^-6 = x / 5.30-x

3.83x10^-7 - 2.03x10^-6x = x

[B] @ equilibrium = 3.83x10^-7 M