IB Unit 6 - Equilibrium

Front

What is the equilibrium constant (Kc)?

Back

The equilibrium constant (Kc) is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium for a reversible chemical reaction at a given temperature.

Front

What does Le Chatelier's Principle state?

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.

Front

What effect does increasing the concentration of reactants have on equilibrium?

Back

Increasing the concentration of reactants will shift the equilibrium position to the right, favoring the formation of products.

Front

How does temperature affect the position of equilibrium in exothermic reactions?

Back

In exothermic reactions, increasing the temperature shifts the equilibrium position to the left, favoring the reactants.

Front

What is the effect of adding a catalyst on equilibrium?

Back

Adding a catalyst does not affect the position of equilibrium; it only speeds up the rate at which equilibrium is reached.

Front

What happens to equilibrium when the volume of a gas reaction system is decreased?

Back

Decreasing the volume of a gas reaction system shifts the equilibrium position towards the side with fewer moles of gas.

Front

Define dynamic equilibrium.

Back

Dynamic equilibrium is a state in a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction, resulting in constant concentrations of reactants and products.

Front

What is the significance of the reaction quotient (Q)?

Back

The reaction quotient (Q) is a measure of the relative concentrations of products and reactants at any point in time, used to predict the direction in which a reaction will proceed to reach equilibrium.

Front

What is the effect of pressure changes on gaseous equilibria?

Back

Changes in pressure will only affect gaseous equilibria; increasing pressure shifts the equilibrium towards the side with fewer moles of gas.

Front

What does it mean if Kc > 1?

Back

If Kc > 1, it indicates that at equilibrium, the concentration of products is greater than that of reactants, favoring the formation of products.