Le Chatelier Principle

Front

What is Le Chatelier's Principle?

Back

Le Chatelier's Principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change and restore a new equilibrium.

Front

What happens to equilibrium when a reactant is removed?

Back

The equilibrium shifts to the left to produce more reactants.

Front

What happens to equilibrium when a product is added?

Back

The equilibrium shifts to the left to consume the added product.

Front

How does increasing temperature affect an exothermic reaction at equilibrium?

Back

Increasing temperature shifts the equilibrium to the left, favoring the reactants.

Front

How does decreasing pressure affect a gaseous equilibrium with more moles of gas on one side?

Back

Decreasing pressure shifts the equilibrium towards the side with more moles of gas.

Front

What effect does adding a catalyst have on a chemical reaction at equilibrium?

Back

Adding a catalyst increases the rate of reaction but does not change the position of equilibrium.

Front

What is the effect of adding H+ ions to a system at equilibrium involving CrO4^2- and Cr2O7^2-?

Back

The equilibrium shifts to the right, producing more Cr2O7^2- and the solution turns more orange.

Front

What happens when Cl- ions are added to a cobalt(II) chloride equilibrium?

Back

The equilibrium shifts to the left to reduce the added Cl- ions, resulting in a more pink solution.

Front

What is the effect of removing a product from a reaction at equilibrium?

Back

The equilibrium shifts to the right to produce more of the removed product.

Front

What is an example of a change that can disturb equilibrium?

Back

Changes in concentration, temperature, or pressure can disturb equilibrium.