# Ch 11: Equilibrium

Watch enlightening equilibrium video lessons with revealing quizzes to measure your understanding. Learn about dynamic equilibrium, Le Chatelier's principle, solubility, titration and more.

## Equilibrium

In a chemical sense, 'equilibrium' refers to a state during which the forward rate of a chemical reaction is equal to the reverse rate of that same reaction. In other words, the things that come out of a reaction are being formed at the same rate as the things that go into that same reaction. Equilibrium is important to understand, because some chemical reactions depend on it, such as the reaction that delivers oxygen from our lungs to other cells in our body. In these lessons, we'll lay out the basics of equilibrium and how to apply it in numerous circumstances. At the end of this chapter, you should be able to:

• Define and give examples of equilibrium in chemical reactions
• Find factors that disturb a state of equilibrium
• Do calculations involving the equilibrium constant, equilibrium quotient, solubility constant and more
• Determine equilibrium between acids and bases
• Understand the basics of titration

Video Objective
Equilibrium: Chemical and Dynamic Describe the concept of equilibrium and provide instances of dynamic equilibrium.
Le Chatelier's Principle: Disruption and Re-Establishment of Equilibrium Explain what factors disrupt equilibrium and how they do it.
Equilibrium Constant (K) and Equilibrium Quotient (Q) Understand and calculate the equilibrium constant and equilibrium quotient.
Using a RICE Table in Equilibrium Calculations Perform equilibrium calculations by designing and referring to a RICE table.
Solubility Equilibrium: Using a Solubility Constant (Ksp) in Calculations Make computations to determine the solubility constants of soluble compounds.
The Common Ion Effect and Selective Precipitation Take the common ion effect and apply it to solving related equations, then make reliable predictions about how precipitates may form.
Acid-Base Equilibrium: Calculating the Ka or Kb of a Solution Analyze the pH and concentrations of different solutions to identify the Kb and Ka levels.
Acid-Base Buffers: Calculating the pH of a Buffered Solution See how a buffer works in solutions, then work it into calculations.
Titration of a Strong Acid or Strong Base Examine an acid-base titration and figure out the related pH.
Titrations with Weak Acids or Weak Bases Determine techniques for compensating for pH changes as a result of titration curves.

10 Lessons in Chapter 11: Equilibrium
Test your knowledge with a 30-question chapter practice test
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.