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Ch 7: MEGA General Science: Stoichiometry & Reactions

About This Chapter

The lessons in this chapter were developed with the intent of preparing you for your upcoming Missouri Educator Gateway Assessments (MEGA) General Science test. These lessons, quizzes and other study tools deal with stoichiometry and reactions.

MEGA General Science: Stoichiometry & Reactions - Chapter Summary

Our expert instructors have put these lessons together as a refresher for you as you prep for the MEGA General Science test. They will increase your understanding of stoichiometry and help you answer test questions about such things as:

  • Working with intermolecular forces in chemistry
  • Using calculations of a chemical equation and mole-to-mole ratios
  • Employing mass-to-mass stoichiometric calculations
  • Defining reactant in chemistry
  • Neutralizing acid-base reactions
  • Understanding redox reactions
  • Modifying the rate of a chemical reaction
  • Examining chemical and dynamic equilibrium
  • Using LeChatelier's Principle

The lessons each include a multiple-choice quiz at the end to test your understanding of what was covered. You can send a question to the Study.com expert if you like. Video lessons include a transcript and also a timeline tool that will take you to specific places in the lesson that you need to review.

11 Lessons in Chapter 7: MEGA General Science: Stoichiometry & Reactions
Test your knowledge with a 30-question chapter practice test
Intermolecular Forces in Chemistry: Definition, Types & Examples

1. Intermolecular Forces in Chemistry: Definition, Types & Examples

This lesson defines the major forces that occur between molecules. Specifically, the lesson explains ion-dipole, dipole-dipole, and London (or dispersion) forces. Several examples are included to provide context.

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

2. 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.

Mass-to-Mass Stoichiometric Calculations

3. Mass-to-Mass Stoichiometric Calculations

Learn how to set up and make mole to mass, mass to mole and mass to mass stoichiometric calculations. Learn how the ratios of moles helps you compare and make calculations. Learn how to relate mole ratios to molar mass.

Reactant in Chemistry: Definition & Examples

4. Reactant in Chemistry: Definition & Examples

This lesson defines reactants within chemical reactions and how reactants are written in chemical reactions. The role of chemical reactions in reactions is explained, and several examples are provided to provide important context.

Neutralization and Acid-Base Reactions

5. Neutralization and Acid-Base Reactions

From this lesson, you will understand the neutralization process between acids and bases. Learn how a hydroxide ion from a base reacts with a hydronium ion from an acid to neutralize each other and form water. Discover what conjugate acids and bases are and what the definition of amphoteric is.

Redox (Oxidation-Reduction) Reactions: Definitions and Examples

6. 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

7. 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.

Effect of Catalysts on Rates of Reaction

8. Effect of Catalysts on Rates of Reaction

In this video lesson, we will learn how catalysts speed up chemical reactions. We'll also discuss how catalysts are used in industry and consider the catalysts in our own bodies. A short quiz will test your new knowledge.

Rate of a Chemical Reaction: Effect of Temperature

9. Rate of a Chemical Reaction: Effect of Temperature

Learn how temperature affects reaction rates. Discover the rate law as well as how the Arrhenius equation relates to the rate law and predicts the effect of temperature on the rate of reaction.

Equilibrium: Chemical and Dynamic

10. 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

11. 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.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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