System Equilibrium - AP Chemistry

Card 0 of 20

Question

Which of the following accurately describes what occurs in reversible reactions?

Answer

The definition of reversible reactions is that they are indeed reversible; in other words, they can proceed in the forward and reverse directions. Since the products can react as well to reform the reactants, these reactions usually do not proceed to completion and instead exist in a dynamic state.

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Question

What is occuring when a mixture reaches a dynamic equilibrium state?

Answer

Dynamic equilibrium means that the forward and reverse reactions are occurring at the same rate so that there is no net change in the concentrations.

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Question

Consider the following reaction:

A+2B\rightarrow2C

The equilibrium constant, K_{eq}, is 0.367.

In a reaction flask, you have a solution containing [A]=0.332\hspace{1 mm}M, [B]=0.0200\hspace{1 mm}M, and [C]=0.332\hspace{1 mm}M. Will the reaction proceed forward (to the right), or backwards (to the left)?

Answer

For the reaction:

A+2B\rightarrow2C

The expression for the equilibrium constant is:

K_{eq}=\frac{[C]^2}{[A][B]^2}

The reaction quotient is:

Q=\frac{[C]^2}{[A][B]^2}=\frac{[0.332]^2}{[0.332][0.0200]^2}=830\hspace{1 mm}M^{-1}

The reaction quotient is much larger than the equilibrium constant, so the reaction will proceed to the left.

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Question

Which of the following is not always true for the given arbitrary reaction in equilibrium?

Answer

The forward and reverse reaction rates are equal for reactions in equilibrium, however, the molar concentration of the reactants and products are usually not equal themselves. One can calculate the equilibrium constant using the equation below.

Compare your answer with the correct one above

Question

Determine the equilibrium expression for the following reaction:

Answer

Equilibrium expressions are a ratio of the concentration of products raised to the stoichiometric coefficient, divided by reactants raised to the stoichiometric coefficient. Solids are omitted from this expression.

For the generic example , the equilibrium expression is .

For our given reaction, we can find the equilibrium expression in a similar manner. Do not forget to omit the solid component of the reaction!

Compare your answer with the correct one above

Question

Which of the following accurately describes what occurs in reversible reactions?

Answer

The definition of reversible reactions is that they are indeed reversible; in other words, they can proceed in the forward and reverse directions. Since the products can react as well to reform the reactants, these reactions usually do not proceed to completion and instead exist in a dynamic state.

Compare your answer with the correct one above

Question

What is occuring when a mixture reaches a dynamic equilibrium state?

Answer

Dynamic equilibrium means that the forward and reverse reactions are occurring at the same rate so that there is no net change in the concentrations.

Compare your answer with the correct one above

Question

Consider the following reaction:

A+2B\rightarrow2C

The equilibrium constant, K_{eq}, is 0.367.

In a reaction flask, you have a solution containing [A]=0.332\hspace{1 mm}M, [B]=0.0200\hspace{1 mm}M, and [C]=0.332\hspace{1 mm}M. Will the reaction proceed forward (to the right), or backwards (to the left)?

Answer

For the reaction:

A+2B\rightarrow2C

The expression for the equilibrium constant is:

K_{eq}=\frac{[C]^2}{[A][B]^2}

The reaction quotient is:

Q=\frac{[C]^2}{[A][B]^2}=\frac{[0.332]^2}{[0.332][0.0200]^2}=830\hspace{1 mm}M^{-1}

The reaction quotient is much larger than the equilibrium constant, so the reaction will proceed to the left.

Compare your answer with the correct one above

Question

Which of the following is not always true for the given arbitrary reaction in equilibrium?

Answer

The forward and reverse reaction rates are equal for reactions in equilibrium, however, the molar concentration of the reactants and products are usually not equal themselves. One can calculate the equilibrium constant using the equation below.

Compare your answer with the correct one above

Question

Determine the equilibrium expression for the following reaction:

Answer

Equilibrium expressions are a ratio of the concentration of products raised to the stoichiometric coefficient, divided by reactants raised to the stoichiometric coefficient. Solids are omitted from this expression.

For the generic example , the equilibrium expression is .

For our given reaction, we can find the equilibrium expression in a similar manner. Do not forget to omit the solid component of the reaction!

Compare your answer with the correct one above

Question

Which of the following accurately describes what occurs in reversible reactions?

Answer

The definition of reversible reactions is that they are indeed reversible; in other words, they can proceed in the forward and reverse directions. Since the products can react as well to reform the reactants, these reactions usually do not proceed to completion and instead exist in a dynamic state.

Compare your answer with the correct one above

Question

What is occuring when a mixture reaches a dynamic equilibrium state?

Answer

Dynamic equilibrium means that the forward and reverse reactions are occurring at the same rate so that there is no net change in the concentrations.

Compare your answer with the correct one above

Question

Consider the following reaction:

A+2B\rightarrow2C

The equilibrium constant, K_{eq}, is 0.367.

In a reaction flask, you have a solution containing [A]=0.332\hspace{1 mm}M, [B]=0.0200\hspace{1 mm}M, and [C]=0.332\hspace{1 mm}M. Will the reaction proceed forward (to the right), or backwards (to the left)?

Answer

For the reaction:

A+2B\rightarrow2C

The expression for the equilibrium constant is:

K_{eq}=\frac{[C]^2}{[A][B]^2}

The reaction quotient is:

Q=\frac{[C]^2}{[A][B]^2}=\frac{[0.332]^2}{[0.332][0.0200]^2}=830\hspace{1 mm}M^{-1}

The reaction quotient is much larger than the equilibrium constant, so the reaction will proceed to the left.

Compare your answer with the correct one above

Question

Which of the following is not always true for the given arbitrary reaction in equilibrium?

Answer

The forward and reverse reaction rates are equal for reactions in equilibrium, however, the molar concentration of the reactants and products are usually not equal themselves. One can calculate the equilibrium constant using the equation below.

Compare your answer with the correct one above

Question

Determine the equilibrium expression for the following reaction:

Answer

Equilibrium expressions are a ratio of the concentration of products raised to the stoichiometric coefficient, divided by reactants raised to the stoichiometric coefficient. Solids are omitted from this expression.

For the generic example , the equilibrium expression is .

For our given reaction, we can find the equilibrium expression in a similar manner. Do not forget to omit the solid component of the reaction!

Compare your answer with the correct one above

Question

Which of the following accurately describes what occurs in reversible reactions?

Answer

The definition of reversible reactions is that they are indeed reversible; in other words, they can proceed in the forward and reverse directions. Since the products can react as well to reform the reactants, these reactions usually do not proceed to completion and instead exist in a dynamic state.

Compare your answer with the correct one above

Question

What is occuring when a mixture reaches a dynamic equilibrium state?

Answer

Dynamic equilibrium means that the forward and reverse reactions are occurring at the same rate so that there is no net change in the concentrations.

Compare your answer with the correct one above

Question

Consider the following reaction:

A+2B\rightarrow2C

The equilibrium constant, K_{eq}, is 0.367.

In a reaction flask, you have a solution containing [A]=0.332\hspace{1 mm}M, [B]=0.0200\hspace{1 mm}M, and [C]=0.332\hspace{1 mm}M. Will the reaction proceed forward (to the right), or backwards (to the left)?

Answer

For the reaction:

A+2B\rightarrow2C

The expression for the equilibrium constant is:

K_{eq}=\frac{[C]^2}{[A][B]^2}

The reaction quotient is:

Q=\frac{[C]^2}{[A][B]^2}=\frac{[0.332]^2}{[0.332][0.0200]^2}=830\hspace{1 mm}M^{-1}

The reaction quotient is much larger than the equilibrium constant, so the reaction will proceed to the left.

Compare your answer with the correct one above

Question

Which of the following is not always true for the given arbitrary reaction in equilibrium?

Answer

The forward and reverse reaction rates are equal for reactions in equilibrium, however, the molar concentration of the reactants and products are usually not equal themselves. One can calculate the equilibrium constant using the equation below.

Compare your answer with the correct one above

Question

Determine the equilibrium expression for the following reaction:

Answer

Equilibrium expressions are a ratio of the concentration of products raised to the stoichiometric coefficient, divided by reactants raised to the stoichiometric coefficient. Solids are omitted from this expression.

For the generic example , the equilibrium expression is .

For our given reaction, we can find the equilibrium expression in a similar manner. Do not forget to omit the solid component of the reaction!

Compare your answer with the correct one above

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