Ch 19: Equilibrium & Common Chemical Reactions - ORELA Middle Grades General Science

About This Chapter

Make the process of preparing for the ORELA Middle Grades General Science assessment easy by watching short video lessons. You can strengthen your knowledge of equilibrium and common chemical reactions and test that knowledge with lesson quizzes.

Equilibrium & Common Chemical Reactions: ORELA Middle Grades General Science - Chapter Summary

In this chapter, you can get reacquainted with science concepts you haven't explored in awhile. Rediscover equilibrium and common chemical reactions to ensure you can answer questions on the ORELA Middle Grades General Science assessment that address the following:

  • Examining equilibrium, Le Chatelier's principle, equilibrium constant and reaction quotient
  • Using solubility constant
  • Understanding how to use a RICE table in equilibrium calculations
  • Analyzing the common ion effect and selective precipitation
  • Describing acid-base equilibrium and acid-base buffers
  • Exploring the titration of a strong acid, strong base, weak acid or weak base
  • Knowing how to write and balance combustion reactions
  • Explaining common chemical reactions and energy changes

You can tailor the lessons to meet your studying needs. Watch them often and in any order. Also, review specific concepts by utilizing the timeline below each video to skip to key topics within the lessons.

Equilibrium & Common Chemical Reactions: ORELA Middle Grades General Science Chapter Objectives

A primary goal of the Equilibrium & Common Chemical Reactions chapter is to ensure you have the knowledge needed to address this subject area on the ORELA Middle Grades General Science exam. This chapter's topics are found in the physical science content domain of the assessment, which constitutes approximately 31% of the total test. Succeeding in this section can improve your chances of earning a passing score of 228 or higher on the entire assessment. It can also enable you to secure the Oregon educator licensure you need to teach general science at the middle-grade level.

Simplify the process of preparing for the exam by watching the video lessons in this chapter. You can also access full video transcripts that offer a written version of the lessons with helpful vocabulary words. Self-assessment quizzes are available to reinforce concepts learned in the lessons and give you practice with questions similarly formatted to the 150 multiple-choice questions found on the computer-based test.

12 Lessons in Chapter 19: Equilibrium & Common Chemical Reactions - ORELA Middle Grades General Science
Test your knowledge with a 30-question chapter practice test
Equilibrium: Chemical and Dynamic

1. 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

2. 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.

Equilibrium Constant (K) and Reaction Quotient (Q)

3. Equilibrium Constant (K) and Reaction Quotient (Q)

In this lesson, we will first define and explain the notion of a chemical equilibrium. Then, you'll learn about the equilibrium constant and reaction quotient. Finally, we'll round off the lesson with a couple of examples to solidify what you've learned!

Using a RICE Table in Equilibrium Calculations

4. Using a RICE Table in Equilibrium Calculations

Learn what the RICE table is and how to fill in the table with the reaction, initial concentration, change in concentration and amount of product and reactants at equilibrium. Learn how to use the RICE table to calculate the concentrations and amounts and the equilibrium constant of equations at equilibrium.

Solubility Equilibrium: Using a Solubility Constant (Ksp) in Calculations

5. Solubility Equilibrium: Using a Solubility Constant (Ksp) in Calculations

Learn the definition of solubility and solubility constant (Ksp) in this lesson. Interpret solubility constants and make calculations involving the dissociation of a slightly soluble compound given molar solubility.

The Common Ion Effect and Selective Precipitation

6. The Common Ion Effect and Selective Precipitation

Learn what the common ion effect is, how to make equilibrium calculations involving it, and how to find the concentrations of ions when adding reactions in equilibrium to solutions that already contain ions.

Acid-Base Equilibrium: Calculating the Ka or Kb of a Solution

7. Acid-Base Equilibrium: Calculating the Ka or Kb of a Solution

In this lesson, you will review acid and base strength and acid and base dissociation. You will then learn what acid and base dissociation constants (Ka and Kb) are, what they mean, and how to perform calculations involving them.

Acid-Base Buffers: Calculating the pH of a Buffered Solution

8. Acid-Base Buffers: Calculating the pH of a Buffered Solution

Learn what a buffer is, how it works, and why we benefit from having our blood buffered. Learn how to calculate the pH of a buffered solution before an acid or base is added and how the pH changes after an acid or base is added.

Titration of a Strong Acid or a Strong Base

9. Titration of a Strong Acid or a Strong Base

Discover what titration is and how to calculate the concentration of an acid or base that has been titrated to equivalence. Learn the meaning of titrant, standard solution and equivalence point. Study titration curves and learn how to determine pH during any point of a titration between a strong acid and strong base.

Titrations with Weak Acids or Weak Bases

10. Titrations with Weak Acids or Weak Bases

Learn about titrations with weak acids or weak bases in this lesson. Study their titration curves and learn about some of their important characteristics. Learn how to calculate pH during titrations involving weak acids and strong bases.

Writing and Balancing Combustion Reactions

11. 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.

Common Chemical Reactions and Energy Change

12. Common Chemical Reactions and Energy Change

This lesson covers the five common types of chemical reactions: combination, decomposition, single-replacement, double-replacement, and combustion. You will learn how to predict what kind of chemical reaction will occur. You'll also explore how matter is conserved, but energy can change.

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

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Other Chapters

Other chapters within the ORELA Middle Grades General Science: Practice & Study Guide course

Support