2.2 Equilibrium and Yield (Part 1 of 4)

What does chemical equilibrium concern?

• How fast a reaction proceeds

• How far a reaction proceeds

• The temperature at which a reaction occurs

• The pressure at which a reaction occurs

What symbol is used to indicate a reversible reaction?

• Plus sign

• Equal sign

• Single arrow

• Double arrow

What happens to the rate of the forward reaction over time in a closed system?

• It decreases but does not reach zero

• It remains constant

• It decreases to zero

• It increases indefinitely

At equilibrium, how do the rates of the forward and backward reactions compare?

• The rates are unpredictable

• The rates are equal

• The backward reaction rate is higher

• The forward reaction rate is higher

What does a dynamic equilibrium imply about the concentrations of reactants and products?

• They become zero

• They become constant

• They increase indefinitely

• They are constantly changing

What can remain constant in a system at dynamic equilibrium?

• Only the color and pH

• Temperature, pressure, color, and pH

• Only the pressure

• Only the temperature

What does the Kc value indicate?

• The speed of the reaction

• The temperature of the reaction

• The yield of the reaction

• The pressure of the reaction

What is true for a homogeneous equilibrium system?

• Only gases are involved

• Only liquids are involved

• Reactants and products exist in different phases

• Reactants and products exist in the same phase

How is the Kc value for a reaction calculated?

• Products over reactants, raised to their coefficients

• Reactants over products, raised to their coefficients

• Sum of reactants and products

• Difference between reactants and products

What does it mean when the equilibrium lies to the right?

• Reactant concentration is higher than the products

• Product concentration is higher than the reactants

• Equal concentrations of reactants and products

• No reactants are left