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Reaction Quotient

For the follo...

Question

For the following reaction:
$P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$
$0.4 m o l$ of $P C l_{5} (g)$ , $0.2 m o l$ of $P C l_{3} (g)$ and $0.6 m o l$ of $C l_{2} (g)$ are taken in a $1 L$ flask.
If $K_{c} = 0.2$ , then the direction in which reaction proceeds is :

Towards reactant side

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Towards products side

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Reaction is at equilibrium

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None of the above

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Solution

The correct option is A Towards reactant side
Given Reaction is:
$P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$
$C o n c e n t r a t i o n = \frac{M o l e s}{V o l u m e}$
$[P C l_{5}] = \frac{0.4}{1} = 0.4 M [P C l_{3}] = \frac{0.2}{1} = 0.2 M [C l_{2}] = \frac{0.6}{1} = 0.6 M$
Finding $Q_{c}$
$Q_{c} = \frac{[P C l_{3}] [C l_{2}]}{[P C l_{5}]}$

puttting the values,
$Q_{c} = \frac{0.2 \times 0.6}{0.4} = 0.3 M > K_{c} (= 0.2)$
Since, $Q > K_{c}$ the reaction proceeds in backward direction i.e. reactant $(P C l_{5})$ side.

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Similar questions

Q. For the following reaction:

P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)

0.4 m o l

P C l_{5} (g)

0.2 m o l

P C l_{3} (g)

and

0.6 m o l

C l_{2} (g)

are taken in a

1 L

flask.
If

K_{c} = 0.2

, then the direction in which reaction proceeds is :

Q. A quantity of

P C l_{5}

was heated in

10 d m^{3}

vessel

250^{0} C

P C l_{5}

g) ⇌

P C l_{3}

(g) +

C l_{2}

(g)
At equilibrium the vessel contains 0.1 mole of

P C l_{5}

and 0.2 mole of

C l_{2}

. The equilibrium constant of the reaction is ?

Q. A quantity of

P C l_{5}

was heated in 10

d m^{3}

vessel

250^{o}

P C l_{5}

(g) ⇌

P C l_{3}

(g) +

C l_{2}

(g)

At equilibrium the vessel contains 0.1 mole of

P C l_{5}

and 0.2 mole of

C l_{2}

The equilibrium constant of the reaction is:

Q. For the following reaction,

P C l_{5} (g) ⇌ P C l_{2} (g) + C l_{2} (g)

0.4 Mole of

P C l_{5}, 0.2

mole of

P C l_{3}

and 0.6 mole of

C l_{2}

are taken in 1 litre flask. if

K_{c}

is 0.2 then, predict the direction in which reaction proceeds.

Q. Suppose the reaction

P C l_{5} (g)

⇌

P C l_{3} (g)

C l_{2} (g)

as equlibirium in closed vessel. What is the effect on equilibirium concentration of the

C l_{2} (g)

by adding

P C l_{5}

at constant temperatue

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Reaction Quotient

Standard XII Chemistry

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For the following reaction: PCl5 (g)⇌PCl3 (g)+Cl2 (g) 0.4 mol of PCl5 (g), 0.2 mol of PCl3 (g) and 0.6 mol of Cl2 (g) are taken in a 1 L flask. If Kc=0.2, then the direction in which reaction proceeds is :

For the following reaction:
$P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$
$0.4 m o l$ of $P C l_{5} (g)$ , $0.2 m o l$ of $P C l_{3} (g)$ and $0.6 m o l$ of $C l_{2} (g)$ are taken in a $1 L$ flask.
If $K_{c} = 0.2$ , then the direction in which reaction proceeds is :