Chemical Equilibrium
Chemistry ⇒ Chemical Kinetics and Equilibrium
Chemical Equilibrium starts at 10 and continues till grade 12.
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A reaction has Kc = 1.0 × 10-5. Which side is favored at equilibrium?
Describe what happens to the equilibrium position if a product is removed from a system at equilibrium.
Describe what is meant by a dynamic equilibrium.
Describe what is meant by the term 'reaction quotient' (Q) and how it is used to predict the direction of a reaction.
A reaction mixture contains 0.3 M A, 0.2 M B, and 0.5 M C at equilibrium for the reaction: A + 2B ⇌ C. Write the Kc expression and calculate its value.
For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen to the equilibrium position if the pressure is increased?
For the reaction: 2A(g) ⇌ B(g) + C(g), if the equilibrium mixture contains 0.2 mol/L of A, 0.1 mol/L of B, and 0.1 mol/L of C, calculate Kc.
For the reaction: 2A(g) ⇌ B(g) + C(g), if the initial concentration of A is 1.0 M and at equilibrium it is 0.6 M, calculate the equilibrium concentrations of B and C.
Which of the following changes will NOT affect the position of equilibrium for a reaction involving only gases?
(1) Change in pressure
(2) Change in temperature
(3) Addition of a catalyst
(4) Change in concentration
Which of the following is a correct statement about the effect of temperature on equilibrium?
(1) Increasing temperature always favors the forward reaction.
(2) Increasing temperature favors the endothermic direction.
(3) Increasing temperature favors the exothermic direction.
(4) Temperature has no effect on equilibrium.
Which of the following is NOT a characteristic of a system at equilibrium?
(1) The rate of the forward reaction equals the rate of the reverse reaction.
(2) The concentrations of reactants and products are changing.
(3) The system is closed.
(4) The macroscopic properties are constant.
Which of the following is NOT included in the equilibrium constant expression?
(1) Gases
(2) Aqueous solutions
(3) Solids
(4) None of the above
Fill in the blank: At equilibrium, the rate of the forward reaction is _______ the rate of the reverse reaction.
Fill in the blank: If Q = Kc, the system is _______.
Fill in the blank: The equilibrium constant for reactions involving gases can also be expressed in terms of _______ instead of concentrations.
Fill in the blank: The equilibrium constant Kp is used for reactions involving _______.
State whether the following statement is true or false: The equilibrium constant depends on the initial concentrations of reactants and products.
True or False: At equilibrium, both the forward and reverse reactions have stopped.
True or False: At equilibrium, the concentrations of reactants and products remain constant over time.
True or False: The addition of an inert gas at constant volume affects the equilibrium position of a gaseous reaction.
