Chemical Equilibrium
Chemistry ⇒ Chemical Kinetics and Equilibrium
Chemical Equilibrium starts at 10 and continues till grade 12.
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Describe the effect of decreasing temperature on the equilibrium position of an endothermic reaction.
Describe what happens to the equilibrium position when an inert gas is added to a reaction mixture at constant volume.
Explain the difference between Kc and Kp.
Explain why changing the concentration of a solid reactant does not affect the position of equilibrium.
Calculate the value of Kc for the reaction: A(g) + B(g) ⇌ C(g), if at equilibrium [A] = 0.2 M, [B] = 0.3 M, and [C] = 0.6 M.
Describe the effect of decreasing temperature on the equilibrium position of an endothermic reaction.
Describe what happens to the equilibrium position when an inert gas is added to a reaction mixture at constant volume.
For the reaction: 2A(g) ⇌ B(g) + C(g), the equilibrium concentrations are [A] = 0.5 M, [B] = 0.2 M, [C] = 0.2 M. Calculate Kc.
If Q < K for a reaction mixture, in which direction will the reaction proceed to reach equilibrium? (1) Forward (2) Reverse (3) No change
If the equilibrium constant Kc for a reaction is 1.5 × 105, which direction is favored at equilibrium? (1) Forward (2) Reverse (3) Neither
Which of the following changes will shift the equilibrium to the right for an exothermic reaction? (1) Increase in temperature (2) Decrease in temperature (3) Addition of a catalyst (4) Increase in pressure
Which of the following is true at equilibrium? (1) The forward and reverse reaction rates are equal. (2) The concentrations of reactants and products are always equal. (3) The reaction has stopped. (4) The system is static.
Fill in the blank: At equilibrium, the rate of the forward reaction is ________ the rate of the reverse reaction.
Fill in the blank: If the value of Kc is much greater than 1, the equilibrium mixture contains mostly ________.
Fill in the blank: The equilibrium constant for a reaction written in the reverse direction is the ________ of the original equilibrium constant.
Fill in the blank: The reaction quotient, Q, is calculated using the ________ concentrations or pressures of reactants and products.
A catalyst increases the rate at which equilibrium is reached but does not affect the position of equilibrium. True or False?
The equilibrium constant expression for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g) is Kc = [NH3]2/([N2][H2]3).
True or False: At equilibrium, the concentrations of reactants and products remain constant over time.
True or False: Pure solids and pure liquids are included in the equilibrium constant expression.
