The equilibrium constant for the formation of hydrogen iodide according to to given equation is K. H2 + I2 <====> 2HI Find the equilibrium constant in terms of K for the reaction: HI <====> 1/2 H2 + 1/2 I2 Please explain.

Dear Student

For the reaction

H₂ + I₂--------> 2HI

K=[HI]² / [H₂] [I₂] = 1 ; It means [HI]² =[H₂] [I₂]

For the reverse reaction

K'=[H₂]^1/2 [I₂^]1/2 /[HI] or we can say K'=[H₂] [I₂] /[HI]²

 

K = K'; since from the previous reaction we know that [HI]² =[H₂] [I₂]

We hope that clarifies your query

With Best regards,

Team

Topperlearning