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Chemical Equilibrium Concepts

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Questions and Answers

What is the primary requirement for a system to be in chemical equilibrium?

The rates of forward and reverse reactions are equal. (correct)

The temperature must be constant.

The reaction must be irreversible.

The reactants must be in a solid state.

What type of equilibrium is established when a solid dissolves in water?

Dynamic equilibrium (correct)

Static equilibrium

Chemical equilibrium

Physical equilibrium

What is the significance of the equilibrium constant (K) in a chemical reaction?

It represents the ratio of the rates of forward and reverse reactions.

It is a measure of the equilibrium concentrations of the reactants and products. (correct)

It determines the rate of the reaction.

It indicates the direction of the reaction.

What happens to the equilibrium constant (K) when the temperature of a reaction increases?

It increases. Signup and view all the answers

What is the effect of adding a catalyst on the equilibrium constant (K) of a reaction?

It does not affect the value of K. Signup and view all the answers

What is a necessary condition for a chemical reaction to be in equilibrium?

The rates of forward and reverse reactions are equal. Signup and view all the answers

What is the purpose of the equilibrium constant (K) in a chemical reaction?

To express the ratio of product to reactant concentrations. Signup and view all the answers

What happens to the equilibrium constant (K) when the reaction is reversed?

It remains the same. Signup and view all the answers

What is the effect of increasing the pressure on the equilibrium of a gaseous reaction?

The reaction shifts to the right. Signup and view all the answers

What is a characteristic of a system in dynamic equilibrium?

The concentrations of reactants and products are constant. Signup and view all the answers

What is the result when the rates of forward and reverse reactions are equal?

Chemical equilibrium is established Signup and view all the answers

What is the purpose of the equilibrium constant expression?

To relate the concentrations of reactants and products Signup and view all the answers

What is the effect of increasing the temperature of an exothermic reaction?

The equilibrium constant decreases Signup and view all the answers

What is the result of adding a catalyst to a reaction system?

The rate of reaction increases Signup and view all the answers

What is a characteristic of a heterogeneous equilibrium?

The reactants and products are in different phases Signup and view all the answers

Study Notes

Aqueous solution and chemical equilibria

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Description

This quiz covers key concepts in chemical equilibrium, including the primary requirements, types of equilibrium, and the significance of the equilibrium constant (K).