Equilibrium Flashcard- AP Chemistry

Front

What is the equilibrium expression for a reaction?

Back

The equilibrium expression is a mathematical representation of the ratio of the concentrations of products to reactants at equilibrium, each raised to the power of their coefficients in the balanced equation.

Front

What does K_c represent in chemical equilibrium?

Back

K_c is the equilibrium constant that quantifies the ratio of the concentrations of products to reactants at equilibrium for a reversible reaction.

Front

How do you write the equilibrium expression for the reaction: 2H₂O₂(aq) ↔ 2H₂O (l) + O₂(g)?

Back

K_c = [O₂] / [H₂O₂]².

Front

What does it mean if K_c is much greater than 1?

Back

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

Front

What does it mean if K_c is much less than 1?

Back

If K_c is much less than 1, it indicates that at equilibrium, the concentration of reactants is much greater than that of products, favoring the formation of reactants.

Front

What is the significance of a reaction reaching equilibrium?

Back

Equilibrium is reached when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products.

Front

What is the role of temperature in chemical equilibrium?

Back

Temperature changes can shift the position of equilibrium according to Le Chatelier's principle, affecting the concentrations of reactants and products.

Front

What is Le Chatelier's principle?

Back

Le Chatelier's principle states that if a system at equilibrium is subjected to a change in concentration, temperature, or pressure, the system will adjust to counteract that change and restore a new equilibrium.

Front

How do you determine the direction of a shift in equilibrium?

Back

To determine the direction of a shift, analyze the change imposed on the system and predict how the system will respond to minimize that change.

Front

What is the difference between homogeneous and heterogeneous equilibrium?

Back

Homogeneous equilibrium involves reactants and products in the same phase, while heterogeneous equilibrium involves reactants and products in different phases.