Cracking the SAT Chemistry Subject Test

(Marvins-Underground-K-12) #1
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Le Chatelier’s Principle


The Effects of Substrate Concentration on Equilibrium


Look at this equilibrium.


A + B C + D

On the left side of the equilibrium equation, we find A and B. On the right side,
we find C and D. A and B act together to produce C and D; meanwhile, C and D
act together to produce A and B.


If we add more A to the reaction system, the reaction will shift to the right, to
produce more C and D at equilibrium.


If we add more B to the reaction, the reaction will shift to the right, to produce
more C and D at equilibrium.


Adding more A and B, of course, will also increase the production of C and D.

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