Chapter 15, Problem 100E

A reaction $\text{A}\left(\text{g}\right)\rightleftharpoons \text{B}\left(\text{g}\right)$ has an equilibrium constant of $\text{1}.0\times \text{1}{0}^{-\text{4}}$ . For which of the initial reaction mixtures is the x is small approximation most likely to apply?

a. [A] = 0.0010 M; [B] = 0.00 M
b. [A] = 0.00 M; [B] = 0.10 M
c. [A] = 0.10 M; [B] = 0.10 M
d. [A] 0.10 M; [B] = 0.00 M