Equilibrium Expressions and States of Matter

In this video, Christina Long explains how to write equilibrium expressions for chemical reactions. She covers the differences between concentration (KC) and pressure (KP) constants, emphasizing the importance of using balanced equations and ignoring solids and liquids. The video includes examples of writing these expressions and discusses homogeneous and heterogeneous equations. The next video will focus on calculating actual values for KC and KP.

What does the subscript 'C' in KC represent in equilibrium expressions?

• Concentration

• Catalyst

• Constant

• Coefficient

In an equilibrium expression, where are the products placed?

• Next to the reactants

• In the denominator

• In the numerator

• Outside the fraction

When writing equilibrium expressions, what operation replaces addition?

• Division

• Multiplication

• Exponentiation

• Subtraction

Which states of matter are ignored when writing equilibrium expressions?

• Solids and gases

• Liquids and solids

• Aqueous and gases

• Gases and liquids

What is the primary difference between KC and KP?

• KC is for temperature, KP is for volume

• KC is for concentration, KP is for pressure

• KC is for solids, KP is for gases

• KC is for gases, KP is for liquids

What is the significance of a balanced equation in writing equilibrium expressions?

• It determines the temperature of the reaction

• It is not necessary for equilibrium expressions

• It allows the use of solids

• It ensures the correct placement of coefficients

In the example with two solids and a gas, which component is used in the equilibrium expression?

• Only the gas

• Only the solids

• Neither solids nor gas

• Both solids and gas

How are homogeneous equations characterized?

• By having different states of matter

• By having only solids

• By having the same state of matter throughout

• By having only gases

What makes an equation heterogeneous?

• It contains only liquids

• It contains only solids

• It contains different states of matter

• It contains only gases

In a heterogeneous equation, which states of matter are typically involved?

• Only gases

• A mix of gases and aqueous solutions

• Only solids

• Only liquids