The decomposition reaction for PCl5 for which the equilibrium constant is 0.030. If you begin an experiment with 0.040M PCl5. What are the expected equilibrium concentrations of all species.

Answer 1

PCl5 ⇄ PCl3 + Cl2

0.030 = [PCl3] [Cl2] / [PCl5] = x * x / (0.040 - x)

x^2 + 0.030 x - 0.0012 = 0

solve for x

Answer 2

Thank you!

Answer 3

What would i pick if both of the roots will result into positive concentration of PCl5