AP and TS EAMCET Medical Model Paper 10

(3) When Δn=0,Kc is independent of concentration. Hence α is independent of concentration.
e.g.: HI⇌

1

2

H2+

1

2

I2
C ------------------------------------------- initial concentration
−Cα+

Cα

2

+

Cα

2

r×n
C(1−α)‌‌

Cα

2

‌‌

Cα

2

equilibrium concentration
Kc=

[H2] 1 2 [I2] 1 2

[HI]

=(

Cα

2

)

1

2

( Cα 2 ) 1 2

C(1−α)

Cα

2

.1

C(1−α)

=

α

2(1−α)