Equilibrium Constant and Its Applications
Chemistry ⇒ Chemical Kinetics and Equilibrium
Equilibrium Constant and Its Applications starts at 11 and continues till grade 12.
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Describe the difference between Kc and Kp.
Explain why pure solids and pure liquids are not included in the equilibrium constant expression.
For the reaction 2A ⇌ B + C, if the initial concentration of A is 1.0 M and at equilibrium [A] = 0.4 M, calculate [B] and [C] at equilibrium.
For the reaction 2NO(g) + O2(g) ⇌ 2NO2(g), if the equilibrium concentrations are [NO] = 0.2 M, [O2] = 0.1 M, and [NO2] = 0.4 M, calculate Kc.
For the reaction 2A ⇌ B + C, if the initial concentration of A is 1.0 M and at equilibrium [A] = 0.4 M, calculate [B] and [C] at equilibrium.
For the reaction 2NO(g) + O2(g) ⇌ 2NO2(g), if the equilibrium concentrations are [NO] = 0.2 M, [O2] = 0.1 M, and [NO2] = 0.4 M, calculate Kc.
For the reaction 2NO2(g) ⇌ N2O4(g), Kc = 5.0 at 300 K. If [NO2] = 0.2 M and [N2O4] = 0.5 M, is the system at equilibrium?
For the reaction A(g) + B(g) ⇌ C(g), if Kc = 2.0 and at equilibrium [A] = 0.5 M, [B] = 0.5 M, what is [C]?
Which of the following changes will shift the equilibrium position of the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g)?
(1) Adding SO2
(2) Removing O2
(3) Increasing pressure
(4) All of the above
Which of the following is NOT included in the equilibrium constant expression?
(1) Gases
(2) Aqueous solutions
(3) Solids
(4) None of the above
Which of the following is the correct unit for Kc for the reaction: 2A ⇌ B + C?
(1) mol/L
(2) (mol/L)2
(3) (mol/L)-1
(4) Unitless
Which of the following is true about the effect of a catalyst on equilibrium?
(1) It increases the value of K
(2) It decreases the value of K
(3) It does not affect the value of K
(4) It shifts the equilibrium position
Fill in the blank: If Q < K, the reaction will proceed in the ________ direction.
Fill in the blank: If the equilibrium constant is very small, the reaction mixture at equilibrium contains mostly ________.
Fill in the blank: If Δn = 0 for a gaseous reaction, then Kp = ________.
Fill in the blank: The equilibrium constant for a reaction at a given temperature is ________ for a particular reaction.
True or False: The equilibrium constant expression for a reaction is determined by the balanced chemical equation.
True or False: The equilibrium constant expression includes solids and pure liquids.
True or False: The equilibrium constant for a reaction is affected by the presence of an inert gas at constant volume.
True or False: The equilibrium constant for a reaction is always positive.
