The Equilibrium Constant, K_c, relates to a chemical reaction at equilibrium. It can be calculated if the equilibrium concentration of each reactant and product in a reaction at equilibrium is known.

 

The Equilibrium Constant, Kp,tells us that equilibrium concentrations are expressed in terms of pressure. 

In one experiment the concentrations of the reacting species at equilibrium are found to be [NO]= 0.0542M, [O2]= 0.127M and [NO2]= 15.5M. Calculate the equilibrium constant and determine the direction of the reaction.

NOTE

• K>1 - Equilibrium will lie to the right and favors the product

• K<1 - Equilibrium will lie to the left and favors the reactant 

• K=1 - Equilibrium State

  

[NO₂]²             =               (15.5M) 

 [NO] ²[O₂]            (0.0542M) ²(0.12M)

 

  = 643,963.28 /M

K>1 - product fermentation 

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