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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See sample questions for grade 11
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 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 2SO2(g) + O2(g) ⇌ 2SO3(g), Kc = 4.0 at 700 K. What is the value of Kc for the reaction SO3(g) ⇌ SO2(g) + 0.5O2(g)?
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]?
For the reaction A(g) ⇌ 2B(g), Kc = 4.0. If [A] = 0.5 M at equilibrium, what is [B]?
For the reaction CO(g) + 2H2(g) ⇌ CH3OH(g), Kc = 10. If [CO] = 0.1 M, [H2] = 0.2 M, and [CH3OH] = 0.4 M, calculate the reaction quotient Q and predict the direction of the shift.
For the reaction H2(g) + I2(g) ⇌ 2HI(g), Kc = 50 at 400°C. If [H2] = 0.2 M, [I2] = 0.2 M, and [HI] = 2.0 M at equilibrium, is the system at equilibrium?
For the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), write the equilibrium constant expression in terms of concentrations.
If the equilibrium constant (Kc) for a reaction is much greater than 1, what does this indicate about the position of equilibrium?
If the equilibrium constant for a reaction is 1.0 × 108, what can you say about the extent of the reaction?
State Le Chatelier's Principle.
The equilibrium constant for a reaction is 0.01. What does this indicate about the relative amounts of reactants and products at equilibrium?
The equilibrium constant for a reaction is 1.0 × 10-5. Is the reaction product-favored or reactant-favored?
The equilibrium constant for a reaction is 2.5 at 25°C. If the reaction is reversed, what is the new equilibrium constant?
What is the effect of decreasing pressure on the equilibrium position of the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)?
What is the effect of increasing temperature on the value of K for an exothermic reaction?
What is the expression for the equilibrium constant (Kc) for the reaction: aA + bB ⇌ cC + dD?
