Ch 7: Chapter 7: Chemical Reactions - Holt Physical Science With Earth & Space Science

About This Chapter

The Chemical Reactions chapter of this Holt Science Spectrum - Physical Science with Earth and Space Science Textbook Companion Course helps students learn the essential lessons associated with chemical reactions. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Chemical Reactions textbook chapter.

How It Works

  • Identify the lessons in the Holt Science Spectrum Chemical Reactions chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover topics relating to chemical reactions that you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Chapter Topics

You'll learn all of the physical science topics covered in the textbook chapter, including:

  • Types of chemical energy and chemical reactions
  • Chemical reactions at the molecular level
  • Balancing chemical equations
  • Mole-to-mole ratios
  • Synthesis reactions and decomposition
  • The law of definite proportions
  • Oxidation-reduction reactions
  • The disruption and re-establishment of equilibrium
  • Factors that affect chemical reaction rates
  • Free radical reactions
  • Single- and double-replacement reactions
  • Equilibrium and LeChatelier's Principle

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15 Lessons in Chapter 7: Chapter 7: Chemical Reactions - Holt Physical Science With Earth & Space Science
Test your knowledge with a 30-question chapter practice test
How Chemical Reactions Form New Products

1. How Chemical Reactions Form New Products

After watching this video, you will be able to explain what a chemical reaction is and how the products can have completely different properties to the reactants. A short quiz will follow.

What is Chemical Energy? - Definition & Examples

2. What is Chemical Energy? - Definition & Examples

This lesson describes chemical energy as a type of potential energy stored in chemicals, such as sugar and gasoline. The lesson discusses how energy is transferred from solar energy to chemical energy by plants and how gasoline is a source of chemical energy used to move cars.

Endothermic and Exothermic Reactions

3. Endothermic and Exothermic Reactions

Explore a chemical reaction at the molecular level. Learn about exothermic and endothermic reactions, what they look like and what happens when they occur. Understand enthalpy and how you can use it to predict whether a reaction will be exothermic or endothermic.

Chemical Reactions and Balancing Chemical Equations

4. Chemical Reactions and Balancing Chemical Equations

In this lesson, you'll learn how to balance a chemical reaction equation using the conservation of matter law. You'll also learn how to write both word and formula equations, what the subscripts after a letter mean and what the numbers in front of compounds mean.

Mole-to-Mole Ratios and Calculations of a Chemical Equation

5. Mole-to-Mole Ratios and Calculations of a Chemical Equation

Learn what a mole ratio is and how to determine and write the mole ratio relating two substances in a chemical equation in this video lesson. Also, learn to make mole-to-mole calculations and solve problems involving moles of substances.

The Law of Definite Proportions: Definition & Examples

6. The Law of Definite Proportions: Definition & Examples

Have you ever had to double a baking recipe? The trick is to always keep the ingredient proportions the same as in the original recipe. This cooking principle follows the Law of Definite Proportions in chemistry, which is the focus of this lesson.

Decomposition and Synthesis Reactions

7. Decomposition and Synthesis Reactions

Learn how to write, identify and predict the products of simple synthesis and decomposition reactions. This includes the composition of reactions with oxygen, of two metals, and of metals with nonmetals, as well as the decomposition of metal carbonates, metal chlorates and metal hydroxides.

Writing and Balancing Combustion Reactions

8. Writing and Balancing Combustion Reactions

Discover what a combustion reaction is as well as what reactants are needed and what products are produced. Learn to write and balance a combustion reaction. Through the concepts of bond energies, learn how to explain why combustion reactions are largely exothermic.

Single-Displacement Reaction: Definition & Examples

9. Single-Displacement Reaction: Definition & Examples

There are so many chemical reactions that occur around us that we classify them into different types. In this lesson, we will discuss single-displacement reactions, one of the main types of chemical reactions.

Double Displacement Reaction: Definition & Examples

10. Double Displacement Reaction: Definition & Examples

When a chemical reaction occurs, bonds are broken and new bonds are formed and products have a different identity from the reactants. In this lesson, we will discuss one of the main types of chemical reactions, called a double displacement reaction.

Free Radical Reactions: Definition & Examples

11. Free Radical Reactions: Definition & Examples

In this lesson we will learn about free radicals. We will discover how they can cause damage to the body and how they can be helpful in other reactions.

Redox (Oxidation-Reduction) Reactions: Definitions and Examples

12. Redox (Oxidation-Reduction) Reactions: Definitions and Examples

This short video will explain oxidation-reduction reactions, or redox reactions for short. The focus is on how electrons are transferred during redox reactions. Learn some neat mnemonic devices to help you remember when an atom is oxidizing or reducing.

Rate of a Chemical Reaction: Modifying Factors

13. Rate of a Chemical Reaction: Modifying Factors

Why are some reactions much faster than others? Is it possible to change how fast a reaction occurs? In this lesson, you will learn what the rate of a chemical reaction is. You will also discover how factors such as temperature, concentration, surface area, and catalysts impact reaction rates.

Equilibrium: Chemical and Dynamic

14. Equilibrium: Chemical and Dynamic

Learn the definition of chemical equilibrium and how it is dynamic. Discover what the equilibrium constant is and how it shows whether the reaction favors the reactants or products. Learn how chemists designate equilibrium in an equation and how they show the difference in reaction rate.

LeChatelier's Principle: Disruption and Re-Establishment of Equilibrium

15. LeChatelier's Principle: Disruption and Re-Establishment of Equilibrium

Learn how Le Chatelier's Principle describes the disruption and re-establishment of equilibrium. Learn to explain the factors that disrupt equilibrium, such as concentration, temperature, and pressure. Learn how each of these factors affects a system in equilibrium.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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