Chemistry

Problem

At 500 K the equilibrium constant for PCl

_5

(g) ⇌ PCl

_3

(g) + Cl

_2

(g) is

K_c = 1.8 \times 10^{-1}

. A rigid container initially holds only 0.450 M PCl

_5

(g) and no products. Calculate the equilibrium concentration (in mol L

^{-1}

) of Cl

_2

(g).