Chemical Equilibrium Click here for blue bottle demonstration [

Chemical EquilibriumChemical Equilibrium

Click here for blue bottle demonstration[http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA3/STILLS/BOTL/BOTLBLU/64JPG48/10.JPG]

Chemical EquilibriumChemical Equilibrium

• 2NO2 N⇄ 2O4

• These reactions can be reversible.

[http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter13/Text_Images/FG13_02.JPG]

Click here for a tutorial

Le Chatelier’s PrincipleLe Chatelier’s Principle

• If a change in conditions occurs, the equilibrium position will shift to cancel out the change.

Click here for a tutorial


• Changing Concentration

• Equilibrium shifts away from the excess concentration

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Hemoglobin, Blood, & Oxygen

[http://wps.prenhall.com/wps/media/objects/476/488316/Instructor_Resources/Chapter_15/FG15_11-04un.JPG]


• Example:

• NH4Cl ⇄ NH3 + HCl

• If more acid (HCl) is added, which side will be “favored”?

• Reactants!


• Changing Pressure (gases only)

• If pressure increases, reaction changes to side with fewer moles.



The opposite is also true…


• Example:

• CH4 (g) + 2 O2 (g) ⇄ CO2 (g) + 2 H2O (l)

• If the pressure is increased, which side would be “favored”?

• Products! (3 moles gas : 1 mole gas)


• Changing Temperature

• If temperature increases, reaction goes to endothermic side.



Click here for Nitrogen Monoxide video.

Clip 1:

2 NO2 (g) N⇄ 2O4 (g) + energy

(Brown Gas) (White Solid)

Clip 2:

NO2 (g) + NO (g) N⇄ 2O3 (g) + energy

(Brown Gas) (Blue Solid)

Chemical Equilibrium Click here for blue bottle demonstration [

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