Chemical equilibrium occurs when a reaction and its reverse reaction proceed at the same rate.

Once equilibrium is achieved, the amount of each reactant and product remains constant.

Chemical Equilibrium

Resources and Activities• Textbook - chapter 15 & ppt file• Online practice quiz• Chemical Equilibrium handouts and

problem sets• Lab activity• POGIL • Chem Guy video lecture series on

Chemical Equilibrium (several)http://www.cosmolearning.com/courses/ap-

chemistry-with-chemguy/video-lectures/ or start with http://www.youtube.com/watch?v=FHPxpkcA6Z4

• Chemtour videos from Norton

N2O4 (g) 2NO2 (g)

http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/animations/no2n2o4equilV8.html

Activities and Problem set for chapter 15 (due date_______)

Lab activities: – Le Châtelier

principle(wet lab)

POGILS (1) : Chemical Equilibrium

Online practice quiz ch 15 due by_____

Chapter 15 worksheets, notes and practice problems sets

In class preview and then Independent work - students to view animations & interactive activities (5 in total from Norton) and write summary notes on each. These summaries are to be included in your portfolio.

Animations to view in class and at home:http://www.wwnorton.com/college/chemistry/gilbert2/contents/

ch15/studyplan.asp(Equilibrium, Equilibrium in the gas phase, Equilibrium and

Thermodynamics, Le Châtelier’s principle, Solving Equilibrium problems)

Additional resources to explore (not mandatory)http://glencoe.mcgraw-hill.com/sites/0023654666/

student_view0/chapter14/animations_center.html(self-assessments A and B)

Outline: Chemical EquilibriumConcept of Chemical Equilibrium for reversible chemical reactions

rates of forward and reverse reactions; equilibrium mixtures of reactants and products

Equilibrium Constant (K)Using the balanced chemical equation to write equilibrium constant expressions

Kc and Kp

Equilibrium constants expressed in terms of concentration or in terms of partial pressures

Equilibrium calculations

Calculating, interpreting and manipulating equilibrium constants (K) and reaction quotients (Q). ICE charts.

Heterogeneous versus homogeneous equilibrium

How to write K for these cases

Le Châtelier principlePredicting the effect of a stress on a reaction at equilibrium

Vocabulary terms • Chemical Equilibrium• Dynamic equilibrium• Law of mass action• Equilibrium constant expression Kc or K

• (these are NOT rate constants (k))• Gaseous equilibrium and Kp

• (Haber process)• Homogeneous and heterogeneous equilibrium• Reaction quotient Q• Le Châtelier’s principle