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How to use Le Chatelier's principle to predict the effect of a change in concentration on...

How to use Le Chatelier's principle to predict the effect of a change in concentration on the equilibrium position and on K?

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Expert Solution

Le Chatelier's Principle: The dynamic equilibrium is disturbed by changing the conditions like concentration, pressure, temperature etc., the position of equilibrium moves to counteract the change.

Consider an equilibium reaction A+2B <===> C+D

the equilibrium constant K=[C][D]/[A][B]2

=> If you increase the concentration of A, the position of equilinrium will move to counteract means it will move so the concentration of A decreases again by reacting with B and forming C and D. The position of equilibrium moves to the right.

=> The value of K is increases as the [A] decreses because K is inversely proportional to [A].

=> If you decrease the concentration of A, the position of equilinrium will move to counteract means it will move so the concentration of A increases again. That means that more C and D will react to replace the A that has been removed.

=> The position of equilibrium moves to the left.

=> The value of K is decreases as the [A] decreses because K is inversely proportional to [A].

queen_honey_blossom answered 2 years ago
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