Chemistry

Problem

At 250 °C,

\text{PCl}_5(g)\rightleftharpoons\text{PCl}_3(g)+\text{Cl}_2(g)

has

K_c=1.80

. A sealed flask is charged with

[\text{PCl}_5]=0.500\,\text{M}

and no products. What is the equilibrium concentration of Cl

_2

? a)

0.321\,\text{M}

0.408\,\text{M}

0.237\,\text{M}

0.204\,\text{M}