JEE Main Chemistry question
At a certain temperature, 2HI ⇌ H₂ + I₂, only 50% HI is dissociated at equilibrium. The equilibrium constant is:
Answer: (D)
Solution
Basis 1 mol HI: H₂=I₂=0.25, HI=0.5. Kc = (0.25)(0.25)/(0.5)² = 0.25.
At a certain temperature, 2HI ⇌ H₂ + I₂, only 50% HI is dissociated at equilibrium. The equilibrium constant is:
Basis 1 mol HI: H₂=I₂=0.25, HI=0.5. Kc = (0.25)(0.25)/(0.5)² = 0.25.