HOME COURSES PREVIEW REVIEW ABOUT
  TOLL-FREE INFO & ORDERING:
M-F: 9am-5pm (PST): (877) RAPID-10
  24/7 TECHNICAL SUPPORT:
  QUICK TOUR:
Quick Movie - How to Learn in 24 Hours
  QUICK SEARCH:
Keywords:  
 
  Rapid Learning Member Area:

Rapid Learning Member Login
Note: If you are a legacy user of chemistry24 members, please request a new login access to the premium server with your full name and old login email via vip@rapidlearningcenter.com
  RAPID COURSE CATALOG:
  Chemistry in 24 Hours
  CHEMISTRY TIPS WEEKLY:

Are you taking a chemistry course or preparing for a chemistry exam? If you are learning chemistry now, the Chemistry Tips Weekly is for you--it is a one minute learning each week to the chemistry mastery, free for all students. The chemistry tips will include the follwing topics

  • Chemistry survival basics
  • Top ten confusions in chemistry
  • How to ace chemistry exams
  • Your professors' confessions
  • Problem-solving tips in chemisrty
  • Plus much more...
Enter your name and email address below and click "Subscribe" to have free Chemistry tips delivered to your inbox weekly.

Your Name*  
Email*  
 

  OTHER RELATED SITES:
Note: For course links to launch, disable popup blockers or hold the ctrl key while clicking the link.

Bonus - Free Coaching for 3 Months :  Need help on your homework or exam questions? Get stuck on chemistry problems? Let Dr. Wayne and his team of faculty help you personally. Order one of our 24-hour rapid chemistry courses today and you will receive 3-month chemistry coaching ($297 value - free). Limited to first 250 students only. Grab yours today!

Equilibrium

Topic Review on "Title":

Dynamic equilibrium is when the rate of the forward and reverse reactions are equal.  The reaction will appear to have stopped, as the concentrations of each species won’t change, but the reaction continues to proceed in both directions.

Equilibrium constants
Equilibrium constant expressions are the ratio of the concentrations of products to reactants using their coefficients from the balanced equation as exponents.  Pure solids and liquids are not included in the equilibrium constant expression.  Equilibrium concentrations are plugged into the expression to solve for the equilibrium constant.  A large equilibrium constant means that the reaction “lies to the right” with more products than reactants at equilibrium.  A small constant means that the reaction “lies to the left” with more reactants the products present at equilibrium.

Reaction Quotients
The reaction quotient is the value when concentrations at any time are plugged into the equilibrium constant expression.  If the reaction quotient equals the equilibrium constant, then the system is at equilibrium.  If the reaction quotient is too large, the reaction will proceed to the left to produce more reactants (and reduce products).  The opposite will happen if the reaction quotient is too small.

Solving equilibrium problems
A simple technique for solving equilibrium problems is the ICE chart method:

  • Make a table with the reactants and products across the top
  • Place “ICE” down the left hand side, for Initial, Change and Equilibrium.
  • Fill in any given information from the problem.
  • Use the balanced equation’s stoichiometric ratio to determine the “change” row.

To solve the problem using the ICE chart:

  • If an equilibrium concentration is known, you can determine the “change” and find the other equilibrium concentrations to plug in and solve for K
  • If you don’t know any equilibrium concentrations, write expressions for them and plug in the expressions into your “K” equation to solve for them.
  • If the K is very tiny (10-5 or smaller), you may approximate that the change is insignificant compared to the original value (if the original value is > 0)  e.g.:  0.25 M – x » 0.25 M

Solubility equilibrium
The solubility equilibrium constant is written for a dissolution reaction (a solid compound dissociates when dissolved in water).  The pure solid reactant is not included in the expression.  A saturated solution is one that is at equilibrium. 

Le Chatelier’s Principle
Le Chatelier’s principle says that if a system at equilibrium is stressed or changed, the system will shift to reach equilibrium again.  Whatever you do to the system, it will un-do it.  For example, if you add more reactants, the reaction will proceed to the right to get rid of the extra reactants and make more products.


Rapid Study Kit for "Title":
Flash Movie Flash Game Flash Card
Core Concept Tutorial Problem Solving Drill Review Cheat Sheet

"Title" Tutorial Summary :

Equilibrium is established when the rate of the forward reaction is equal to the rate of reaction of the reverse reaction in a reversible reaction.  This tutorial introduces how equilibrium is established, how equilibrium constant expressions are written and how equilibrium constants are calculated.  A problem solving technique for equilibrium problems will be illustrated in the examples.  The use of the reaction quotient to determine if a system is at equilibrium is illustrated.  Le Chatelier’s principle will be introduced, along with solubility equilibrium.


Tutorial Features:

Specific Tutorial Features:

  • Molecular animation of establishment of dynamic equilibrium
  • Animation of equations to show a change in the ratio of product to reactants
  • Use of “ICE Chart” problem solving technique for solving equilibrium problems
  • Application of Le Chatelier’s principle to the manufacturing industry
  • How do these questions look on the AP Exam?

 Series Features:

  • Concept map showing inter-connections of new concepts in this tutorial and those previously introduced.
  • Definition slides introduce terms as they are needed.
  • Visual representation of concepts
  • Animated examples—worked out step by step
  • A concise summary is given at the conclusion of the tutorial.

"Title" Topic List:
  • Dynamic equilibrium
  • Equilibrium constant
    • Writing expressions
    • Calculating constants
    • Meaning of the equilibrium constant
  • Reaction quotient
    • Writing expressions and finding the value
    • Using it to determine if it’s at equilibrium
  • Solving equilibrium problems
    • Using the ICE chart
  • Solubility equilibrium
  • Le Chatelier’s principle


See all 24 lessons in college chemistry, including concept tutorials, problem drills and cheat sheets:
Teach Yourself AP Chemistry Visually in 24 Hours

© 2015 Rapid Learning Center | Privacy Policy | Disclaimer | Affiliates
Chemistry Survival, Biology Survival, Physics Survival,
and Mathematics Survival Publishing are the divisions of Rapid Learning Inc.