At a certain temperature, only 50 % HI is dissociated into H2 and I2 at equilibrium. The equilibrium constant is :

Question

At a certain temperature, only 50 % HI is dissociated into H2 and I2 at equilibrium. The equilibrium constant is : (A) 1.0 (B) 3.0 (C) 0.5 (D) 0.25

Tardigrade Admin · Accepted Answer

beginarrayl 2 HI leftharpoons H 2+ I 2 text a 0 0 a (1-0.5) 0.25 a 0.25 a K =((0.25 a )(0.25 a )/(0.5 a )2) K =0.25 endarray

Q. At a certain temperature, only $50%$ $H I$ is dissociated into $H_{2}$ and $I_{2}$ at equilibrium. The equilibrium constant is :