Equilibrium Expressions in Chemistry

The video tutorial explains how to write equilibrium expressions, focusing on the inclusion of gases and the exclusion of solids and liquids. It covers the use of equilibrium constants (K) and the distinction between using concentration (Kc) and pressure (Kp) in these expressions. The tutorial emphasizes the importance of omitting solids and liquids from equilibrium expressions and provides guidance on when to use brackets for concentration and parentheses for pressure.

What is always included in equilibrium expressions when dealing with gases?

• Only the reactants

• Only the products

• Neither reactants nor products

• Both reactants and products

How are solids treated in equilibrium expressions?

• They are not included

• They are included only if they are products

• They are included only if they are reactants

• They are always included

What is the equilibrium constant expression when no reactants or products are present?

• K = -1

• K = infinity

• K = 1

• K = 0

How are liquids generally treated in equilibrium expressions?

• They are included only if they are reactants

• They are always included

• They are included only if they are products

• They are not included

In the context of AP Chemistry, which liquid is an exception and often considered in equilibrium expressions?

• Ethanol

• Water

• Acetone

• Benzene

What does Kc represent in equilibrium expressions?

• Equilibrium constant using pressure

• Equilibrium constant using concentration

• Equilibrium constant using temperature

• Equilibrium constant using volume

What does Kp represent in equilibrium expressions?

• Equilibrium constant using volume

• Equilibrium constant using temperature

• Equilibrium constant using pressure

• Equilibrium constant using concentration

What is the difference in notation between Kc and Kp expressions?

• Both use brackets

• Kc uses brackets, Kp uses parentheses

• Kc uses parentheses, Kp uses brackets

• Both use parentheses

What should be omitted from equilibrium expressions?

• Aqueous solutions

• Solids

• Liquids

• Gases

When should you use brackets in equilibrium expressions?

• When dealing with volume

• When dealing with pressure

• When dealing with concentration

• When dealing with temperature