MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Derivation of Kp and Kc

Equimolar con...

Question

Equimolar concentrations of $H_{2} a n d I_{2}$ are heated to equilibrium in a 2litre flask. At equilibrium, the forward and backward rate constants are found to be equal. What percentage of initial concentration of $H_{2}$ has reacted at equilibrium?

A

33.33 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

75 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

50 %

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

15 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $50 %$
Solution:Correct option is c).

$\begin{matrix} H_{2} (g) + & l_{2} (g) ⇋ & 2 H I (g) I n i t i a l m o l e s & 1 & 1 & 0 A t e q u i l i b r i u m & 1 - x & 1 - x & 2 x M o l a r c o n c e n t r a t i o n (m o l / L) & (1 - x) / 2 & (1 - x) / 2 & 2 x / 2 = x \end{matrix}$

$K = x^{2} / \frac{(1 - x) \times (1 - x)}{2 \times 2} = 4 x^{2} / (1 - x)^{2} \approx 4 x^{2}$
$K = K_{f} / K_{b} = 1$

$4 x^{2} = 1 x = \frac{1}{2}, i . e ., 50 %$

Suggest Corrections

thumbs-up

1

Similar questions

Q. Equimolar concentrations of

H_{2} a n d I_{2}

are heated to equilibrium in a 2litre flask. At equilibrium, the forward and backward rate constants are found to be equal. What percentage of initial concentration of

H_{2}

has reacted at equilibrium?

Q. Equimolar concentration of

H_{2}

I_{2}

are heated equilibrium in a

1

liter flask at equilibrium the forward and backward rate constants are found to be equal what percentage of initial concentration of

H_{2}

has reached at equilibrium

Q. The equilibrium constant,

K_{c}

for the reaction

H_{2} (g) + I_{2} (g) ⇌ 2 H I (g)

56.8

800 K

. When the mixture was analysed, it was found to contain

0.316 m o l / L

H I

800 K

. What are the concentrations of

H_{2}

I_{2}

at equilibrium? (Assume that initial concentrations of

H_{2}

I_{2}

H_{2}

I_{2}

and three moles of

H I

are injected in a

1

litre flask. What will be the concentration of

H_{2}, I_{2}

H I

at equilibrium at

490^{o} C

? The equilibrium constant for the reaction at

490^{o} C

45.9

H_{2} + I_{2} ⇌ 2 H I

Determine the equilibrium constant if
(a) concentration of

H_{2}, I_{2}

H I

at equilibrium are

8.0, 3.0

28.0

mol/lit. respectively.
(b) amount of

H_{2}, I_{2}

H I

at equilibrium are

0.2, 9.2525

44.8

gram respectively.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Equilibrium Constants

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Derivation of Kp and Kc

Standard XI Chemistry

Join BYJU'S Learning Program

CrossIcon