Chem 108 Class Lab Week 13 Pick a
Chem 108: Class/ Lab Week 13 Pick a vial and a plastic dropper Using the vial number, sign-in next to your name on the Lab roster
To Do & DUE Today Chem 108: Lab Week 13
Completed Report & Post Lab Questions Due Today: Laboratory Manual Seven Solution Problem (Individual) Report Form pp. 76 -80; DUE Today Plus POST LAB Form DUE Today http: //www. chemconnections. org/general/chem 108/7 Solutions%20 Post%20 Lab%20 form. pdf Turn in individual completed forms with the name of partner(s) in parentheses on cover page
Chem 108: Class/ Lab Week 13 TODAY: 1) Fluid Exchange (Handout) Due Next Lab 2) To Do: Acid-Base Equilibrium Experiment (Handout) Data completed & signed before leaving Lab Follow Instructions http: //chemconnections. org/general/chem 120/fluid-ex. 108. html
Chem 108: Class/ Lab Week 13 TODAY: Fluid Exchange (Handout) http: //chemconnections. org/general/chem 120/fluid-ex. 108. html Wait for Dr. R's instructions on exchanging fluids, keeping records, and using the forms provided.
Acid-Base Indicators <7 ACIDIC Neutral >7 BASIC
Indicators
Acid-Base Indicators
Chem 108: Class/ Lab Week 13 TODAY: 1) Fluid Exchange (Handout) Due Next Lab 2) To Do: Acid-Base Equilibrium Experiment (Handout) Data table completed & signed before leaving Lab Fully Completed Handout Due Next Week
Lab: litmus & p. H paper; universal Indicator
Lab p. H: p. H Meter (Chem 120) 6. 0 10. 8 7. 0 6. 4 10. 1 8. 3 4. 7 7. 0 9. 0 12. 0 5. 4 6. 4
Chem 108: Class/ Lab Week 13 Post Lab / Guiding Questions Due Next Week (Submit on-line) http: //chemconnections. org/general/chem 108/Acid-Base%20 Descriptions%20 Guide. html http: //chemconnections. org/general/chem 108/Acids-Bases%20 Guide. html
“Acid” Rain The p. H of “clean” rain is slightly acidic ~5. 6 (< 7 is acidic) due to (Seltzer) the CO 2 - carbonic acid, H 2 CO 3 (aq) CO 2 (g) + H 2 O(l) H 2 CO 3 (aq) H 3 O+(aq) + HCO 3 -(aq) Acids are also produced by the reaction of sulfur dioxide and sulfur trioxide with water, which adds to the acidity of rain. SO 2 (g) + H 2 O(l) H 2 SO 3 (aq) 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) + H 2 O(l) H 2 SO 4 (aq)
Acid Rain - Tolerances CO 2 (g) + H 2 O(l) H 2 CO 3 (aq) SO 3 (g) + H 2 O(l) H 3 O+(aq) + HCO 3 -(aq) H 2 SO 4 (aq) Frogs are the most tolerant on the list. Clams & snails most sensitive.
Acid Rain CO 2 (g) + H 2 O(l) H 2 CO 3 (aq) SO 3 (g) + H 2 O(l) Ca. CO 3 (g) + H 2 SO 4(aq) H 3 O+(aq) + HCO 3 -(aq) H 2 SO 4 (aq) ? ? Effects on marble, limestone & (old) blackboard chalk, Ca. CO 3?
Atmospheric Pollutants Acid Rain Protection
Acid Rain – Global p. H – Citizen Science http: //www. monitorwater. org/ p. H of lakes, rivers & streams
Acid-Base EQUILIBRIUM Increasing Ocean Acidity CO 2(g) + H 2 O (l) HCO 3 -1(aq) + H+1(aq) CO 3 -2(aq) + H+1(aq) (Seltzer) Oceans: p. H ~ 8. 1 and falling http: //www. tos. org/oceanography/issues/issue_archive/22_4. html
Acid-Base EQUILIBRIUM Increasing Ocean Acidity CO 2(g) + H 2 O (l) HCO 3 -1(aq) + H+1(aq) CO 3 -2(aq) + H+1(aq) (Seltzer) Oceans: p. H ~ 8. 1 and falling http: //www. tos. org/oceanography/issues/issue_archive/22_4. html
Acid-Base EQUILIBRIUM Increasing Ocean Acidity CO 2(g) + H 2 O (l) HCO 3 -1(aq) + H+1(aq) CO 3 -2(aq) + H+1(aq) (Seltzer) Oceans: p. H ~ 8. 1 and falling http: //www. tos. org/oceanography/issues/issue_archive/22_4. html Increasing CO 2 is decreasing ocean p. H; long term effects? http: //sos. noaa. gov/datasets/Ocean/ocean_acidification. html
Acid-Base EQUILIBRIUM Increasing Ocean Acidity CO 2(g) + H 2 O (l) HCO 3 -1(aq) + H+1(aq) CO 3 -2(aq) + H+1(aq) (Seltzer) Oceans: p. H ~ 8. 1 and falling http: //www. tos. org/oceanography/issues/issue_archive/22_4. html Increasing CO 2 is decreasing ocean p. H; long term effects? http: //sos. noaa. gov/datasets/Ocean/ocean_acidification. html
Global Warming - Climate Change https: //www. co 2. earth/ Has this number changed in the past 6 months?
Global Warming - Climate Change https: //www. co 2. earth/ What is your present understanding? Pick up a scantron and a 20 question handout on leaving lab. Turn in scantron with answers next week. 100% Quiz credit for turning in completed scantron next week. http: //chemconnections. org/general/chem 108/Global%20 warming%20 questions. pdf
Completed Report & Post Lab Questions Due Today: Laboratory Manual Seven Solution Problem (Individual) Report Form pp. 76 -80; DUE Today Plus POST LAB Form DUE Today http: //www. chemconnections. org/general/chem 108/7 Solutions%20 Post%20 Lab%20 form. pdf Turn in individual completed forms with the name of partner(s) in parentheses on cover page
Acid Rain How does acid rain relate to global warming and energy policy? Fossil fuels: coal and oil?
Energy (Carbon)Global (CO 2) Warming (Carbon) Economy Jobs (CO 2)
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