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Equilibrium Constant

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AP Chemistry

Definition

The equilibrium constant (K) is a number that expresses how far a chemical equation proceeds forward towards products at equilibrium conditions.

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Practice Questions (20+)

How can the value for the equilibrium constant be changed?
A + 3B ⇌ 2C + 2D is at equilibrium. The initial concentration of A is 1.2 M, and the initial concentration of B is 1.5 M. The concentration of C at equilibrium is 0.6 M. What is the equilibrium constant, K?
What happens to the equilibrium constant (K) when the temperature of a system is increased?
Which of the following is true about the relationship between the equilibrium constant (K) and cell potential (Ecell)?
Which of the following is true about the relationship between the cell potential (Ecell) and the equilibrium constant (K) in an electrochemical cell?
Which of the following statements about the equilibrium constant, Kc, is true?
In a reaction with an equilibrium constant K = 10^-3, if the reaction quotient Q = 10^-4, what can be said about the direction of the reaction?
A reaction has an equilibrium constant K of 2.5 x 10^-3 at a certain temperature. If the reaction quotient Q is calculated to be 8.0 x 10^-4, what can be said about the direction of the reaction?
Write the expression for the equilibrium constant, Kp, for the forward reaction: N₂(g) + O₂(g) ⇌ 2NO(g)
Which of the following correctly represents the equilibrium constant expression for the reaction 2A + B ⇌ C + 2D?
What is the equilibrium constant expression for the reaction 2A + B <-> 3C?
For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), the equilibrium constant Kp is 2.0 x 10^3. What does this value tell you about the relative amounts of reactants and products at equilibrium?
A reaction is shown to occur at 298 K, and equilibrium is reached. The reaction proceeds as follows: 2A⇌B. It is found that the concentration of B is found to be 0.5 M and the concentration of A is 2.0 M. What is the equilibrium constant for this reaction?
A reaction is said to proceed where for every two molecules of A and three molecules of B (reactants) to form two molecules of C and one molecule of D (products). The concentration of the molecules is 10 M, 5 M, 20 M, and 2 M, respectively. What is the equilibrium constant Kc of this reaction?
A reaction occurs as A+4B⇌3C and it is found to have reached equilibrium. The concentration of A, B, and C is listed below. What is the equilibrium constant Kc for this reaction? [A]= 0.40 M [B]= 0.20 M [C]= 0.50 M
A reaction is said to favor the reactants at a specified temperature when the equilibrium constant is what value?
Which of the following statements is true regarding a chemical reaction if the equilibrium constant is large?
A chemical reaction has established equilibrium in a container in which there are all gaseous molecules. There are known to be five moles of the products and one mole of the reactants. What can be said about the partial pressure and how does it relate to the equilibrium constant?
What is true if the equilibrium constant for a reaction is very small?
Which of the following would show that the equilibrium constant for a chemical reaction is very small?

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Equilibrium Constant

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Equilibrium Constant

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AP Chemistry

Definition

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"Equilibrium Constant" also found in:

Subjects (28)

Practice Questions (20+)

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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.

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