Question

Consider the following reaction:
SO 2 Cl 2 (g)⇌SO 2 (g)+Cl 2 (g) {\rm{SO}}_2 {\rm{Cl}}_2 \left( g \right)\; \rightleftharpoons \;{\rm{SO}}_2 \left( g \right)\; + \;{\rm{Cl}}_2 \left( g \right)
A reaction mixture is made containing an initial [SO 2 Cl 2 ] \left[ {{\rm{SO}}_2 {\rm{Cl}}_2 } \right] of 2.1×10−2M M . At equilibrium, [Cl 2 ]= \left[ {{\rm{Cl}}_2 } \right] = 1.3×10−2M M .
Calculate the value of the equilibrium constant (K c ) \left( {K_{\rm{c}} } \right).