Unit 13: Reaction Rates and Equilibrium

Front

What is the effect of an inhibitor on reaction rate?

Back

An inhibitor decreases the reaction rate by slowing down the reaction process.

Front

What does a catalyst do to a reaction?

Back

A catalyst lowers the activation energy of a reaction, allowing it to proceed faster without being consumed.

Front

What is the equilibrium constant (K) for a reaction?

Back

The equilibrium constant (K) is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium.

Front

How do you calculate the equilibrium constant for the reaction 2X(g) + Y(g) ⇄ 3Z(g) with given concentrations?

Back

K = [Z]^3 / ([X]^2 * [Y]) = 32.

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 the temperature is decreased in an exothermic reaction?

Back

The equilibrium shifts to the left, favoring the formation of reactants.

Front

What is Le Chatelier's Principle?

Back

Le Chatelier's Principle states that if a system at equilibrium is disturbed, the system will shift in a direction that counteracts the disturbance.

Front

What is the effect of increasing the concentration of reactants on equilibrium?

Back

Increasing the concentration of reactants shifts the equilibrium to the right, favoring the formation of products.

Front

What is the role of temperature in chemical equilibrium?

Back

Temperature changes can shift the position of equilibrium; increasing temperature favors endothermic reactions, while decreasing favors exothermic reactions.

Front

What does it mean for a reaction to be at equilibrium?

Back

At equilibrium, the rates of the forward and reverse reactions are equal, and the concentrations of reactants and products remain constant.