Chemical Equilibria Concepts and Applications

This video provides an overview of chemical equilibria, focusing on equilibrium reactions, intermediates, and the calculation of equilibrium constants. It explains how the direction of a reaction affects the equilibrium constant and details how to write equilibrium constant expressions. The video also highlights the importance of understanding the relationship between individual reactions and their overall equilibrium constants.

What is the main focus of the video regarding chemical equilibria?

• The dependency of reactions on each other

• The speed of chemical reactions

• The role of catalysts in reactions

• The effect of temperature on reaction rates

In the context of chemical equilibria, what does the term 'intermediates' refer to?

• Reactants that do not change during the reaction

• Final products of a reaction

• Substances that are formed and consumed during the reaction

• Catalysts used in the reaction

How is the equilibrium constant for the overall reaction determined?

• By adding the equilibrium constants of individual reactions

• By multiplying the equilibrium constants of individual reactions

• By subtracting the equilibrium constants of individual reactions

• By dividing the equilibrium constants of individual reactions

What happens to the equilibrium constant when the direction of a reaction is reversed?

• It remains the same

• It becomes the reciprocal of the original

• It doubles

• It halves

What is the relationship between products and reactants in an equilibrium reaction?

• Reactants are always on the left side

• Products are always on the right side

• Products are always more than reactants

• They can switch sides as the reaction is reversible

What is the effect of flipping a chemical equation on the equilibrium constant?

• It doubles the equilibrium constant

• It makes the equilibrium constant negative

• It results in the reciprocal of the equilibrium constant

• It has no effect on the equilibrium constant

Which of the following does NOT appear in the equilibrium constant expressions?

• Concentration of solutions

• Concentration of gases

• Concentration of reactants

• Concentration of pure solids

Why must the balanced equation and temperature be specified when quoting an equilibrium constant?

• Because they determine the units of the constant

• Because they affect the speed of the reaction

• Because they are needed for calculating reaction rates

• Because they can change the value of the equilibrium constant

What is the significance of the equilibrium constant being dimensionless?

• It indicates the speed of the reaction

• It shows the reaction is at equilibrium

• It means the constant is independent of units

• It suggests the reaction is irreversible

What is the effect of multiplying a chemical equation by a number on the equilibrium constant?

• It does not affect the equilibrium constant

• It squares the equilibrium constant

• It changes the equilibrium constant

• It halves the equilibrium constant