chemical equilibrium and the acidification of the ocean a chem 30 lesson jordan sevenhuysen february...
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![Page 1: Chemical Equilibrium and the Acidification of the Ocean A Chem 30 Lesson Jordan Sevenhuysen February 9 th, 2012](https://reader036.vdocuments.net/reader036/viewer/2022081700/56649cff5503460f949cffe5/html5/thumbnails/1.jpg)
Chemical Equilibrium and the Acidification of the Ocean
A Chem 30 LessonJordan SevenhuysenFebruary 9th, 2012
![Page 2: Chemical Equilibrium and the Acidification of the Ocean A Chem 30 Lesson Jordan Sevenhuysen February 9 th, 2012](https://reader036.vdocuments.net/reader036/viewer/2022081700/56649cff5503460f949cffe5/html5/thumbnails/2.jpg)
Chemical EquilibriumJordan Sevenhuysen
The Problem:How does atmospheric CO2 levels effect
the pH of the ocean? What does this mean for marine organisms?
Carbon Cycle Learning Tool Ocean Acidification Grapher
![Page 3: Chemical Equilibrium and the Acidification of the Ocean A Chem 30 Lesson Jordan Sevenhuysen February 9 th, 2012](https://reader036.vdocuments.net/reader036/viewer/2022081700/56649cff5503460f949cffe5/html5/thumbnails/3.jpg)
H2O + CO2(aq) H2CO3
HCO3– H+ + CO3
2–
Ka2 = 4.7×10−11
CaCO3 Ca2+ + CO32–
Chemical EquilibriumJordan Sevenhuysen
H2CO3 H+ + HCO3–
Ka1 = 2.5×10−4
P(CO2) = kH[CO2(aq)]
CO2 and Ocean pH Applet
![Page 4: Chemical Equilibrium and the Acidification of the Ocean A Chem 30 Lesson Jordan Sevenhuysen February 9 th, 2012](https://reader036.vdocuments.net/reader036/viewer/2022081700/56649cff5503460f949cffe5/html5/thumbnails/4.jpg)
H2O + CO2(aq) H2CO3
Kh = 1.70×10−3
HCO3– H+ + CO3
2–
Ka2 = 4.7×10−11
CaCO3 Ca2+ + CO32–
Ksp = 3.7×10−9 to 8.7×10−9
Chemical EquilibriumJordan Sevenhuysen
H2CO3 H+ + HCO3–
Ka1 = 2.5×10−4
P(CO2) = kH[CO2(aq)]kH = 29.76 atm/(mol/L)
![Page 5: Chemical Equilibrium and the Acidification of the Ocean A Chem 30 Lesson Jordan Sevenhuysen February 9 th, 2012](https://reader036.vdocuments.net/reader036/viewer/2022081700/56649cff5503460f949cffe5/html5/thumbnails/5.jpg)
Concepts Developed/Used:• Equilibrium systems• Le Chatelier’s Principle• ICE tables• Acid/Bases• Ka, Kb
Main goal is to have students work with and explore equilibrium expressions and equations.
Chemical EquilibriumJordan Sevenhuysen
![Page 6: Chemical Equilibrium and the Acidification of the Ocean A Chem 30 Lesson Jordan Sevenhuysen February 9 th, 2012](https://reader036.vdocuments.net/reader036/viewer/2022081700/56649cff5503460f949cffe5/html5/thumbnails/6.jpg)
POS ObjectivesUnit D: Chemical Equilibrium Focusing on Acid-Base Systems
• Students will explain that there is a balance of opposing reactions in chemical equilibrium systems. (General Outcome 1)
• Students will identify, write and interpret chemical equations for systems at equilibrium. (30-D1.2k)
• Predict, qualitatively, using Le Chatelier’s principle, shifts in equilibrium caused by changes in temperature, pressure, volume, concentration or the addition of a catalyst and describe how these changes affect the equilibrium constant. (30-D1.3k)
Chemical EquilibriumJordan Sevenhuysen