APPLICATION OF Kc

by • 27/08/2013 • GeneralComments (0)308

APPLICATION OF Kc:

The law of equilibrium is used to determine the equilibrium constant ‘Kc’ of a reversible reaction important applications of Kc are giving below:

i. TO PREDICT THE DIRECTION OF A REACTION:

Consider in during a reaction.

Kc = [product] / [reactant]

 

1. If Kc < Kc:

If during any chemical reaction. The value of Kc (calculate Kc) is less than standard Kc then it means that reaction is not at equilibrium and move in forward direction to gain equilibrium,

Rf > Rr

 

2. If Kc > Kc:

If during any chemical reaction the value of Kc is greater than standard Kc then it means that reaction is not at equilibrium and moves in reverse direction to gain equilibrium.

Rf < Rr

3. If Kc = Kc:

If during any chemical reaction the value of Kc is equal to standard Kc then it means that reaction is at equilibrium.

Rf = Rr

ii. TO PREDICT OF THE EXTENT OF REACTION

 

1. If the value of Kc is very large:

If the value of Kc is very large for any reversible reaction, it means that reactant are convened in to product.

2O3 <==> 3O2 Kc =1055

 

2. If the value of Kc is very Small:

If the value of Kc is very low for any reversible reaction, it means that a small quantity of reactant are converted in to product.

2Hf <==>H2 + F2 Kc =10-13

3. If the value of Kc is Moderate:

If the value of Kc is moderate for any reversible reaction, it means that the quantity of reactant converted in to product neither very high nor very low

2N2 + 3H2 <==>2NH3 Kc =10

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