AcidBase Equilibrium BUFFERS Mixtures of a weak acid
Acid-Base Equilibrium BUFFERS Mixtures of a weak acid & its conjugate base Eg. CH 3 COOH + H 2 O �CH 3 COO + H 3 O+ Dr. Ron Rusay Or: mixtures of a weak base & its conjugate acid
BUFFERS Weak Acid-Weak Base Systems Example: H 2 CO 3(aq) / HCO 3 -1(aq) / CO 3 -2(aq) CO 2(g) + H 2 O (l) �HCO 3 -1(aq) + H+1(aq) � CO 3 -2(aq) + H+1(aq) https: //www. youtube. com/watch? v=XR_0 k 8 JIaw. Y https: //www. youtube. com/watch? v=ZLKEj. Xb. CU 30
QUESTION In the following equilibrium: HCO 3 - (aq) + H 2 O (l) �H 2 CO 3 (aq) + OH- (aq) A) HCO 3 - is an acid and H 2 CO 3 is its conjugate base. B) H 2 O is an acid and OH- is its conjugate base. C) HCO 3 - is an acid and OH- is its conjugate base. D) H 2 O is an acid and H 2 CO 3 is its conjugate base. E) H 2 O is an acid and HCO 3 - is its conjugate base.
H 2 CO 3(aq) / HCO 3 -1(aq) / CO 3 -2(aq) Two VERY IMPORTANT Buffer Systems “Bicarbonate” CO 2(g) + H 2 O (l) �HCO 3 -1(aq) + H+1(aq) � CO 3 -2(aq) + H+1(aq) 1. Blood: a human’s blood serum volume is relatively small, 4 -6 Liters with a narrow p. H range, p. H = 7. 35 – 7. 45; p. H is maintained through buffering (homeostasis) Have you ever had respiratory alkalosis during an exam? 2. Oceans: an extraordinarily large volume of a “salt water” solution with a p. H ~ 8. 1; maintained through buffering
Human & Oceanic Bicarbonate Buffer Systems http: //chemconnections. org/general/chem 121/Buffers-Med. Pres. htm http: //chemconnections. org/general/chem 121/Buffers-CO 2 Oceans-2011. htm
EQUILIBRIUM CO 2 & Oceanic Bicarbonate Buffering CO 2(g) + H 2 O (l) �HCO 3 -1(aq) + H+1(aq) � CO 3 -2(aq) + H+1(aq) 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
Bicarbonate Buffer Systems HCO 3 -1 CO 3 -2 acid CO 3 -2 HCO 3 -1 CO 3 -2 HCO 3 -1 conj. base CO 3 -2 HCO 3 -1 CO 3 -2
Calcium Carbonate Marble / Shells / Coral (Reaction with Acid) https: //www. youtube. com/watch? v=TJYOx. GHNTzg CO 3 -2 (aq) + 2 H+(aq) CO 2 (g) + H 2 O (l) Ca. CO 3 (s) + 2 H+(aq) CO 2 (g) + H 2 O (l) + Ca+2(aq) � � https: //www. youtube. com/watch? v=Hw. Dyn_ZPVvw
Coral Reefs & Marine Animals https: //www. nhm. ac. uk/discover/quick-questions/howdoes-ocean-acidification-affect-marine-life. html
https: //www. carbonbrief. org/ocean-acidifiction-decline-of-great-barrierreef-likely-to-be-worse-than-feared
Great Barrier Reef Queensland, Australia Largest coral reef system composed of over 2, 900 individual reefs and 900 islands stretching for over 2, 300 kilometres over an area of approximately 134, 634 mi² 344, 400 km². The reef is located in the Coral Sea, off the coast of Queensland, Australia. https: //www. carbonbrief. org/ocean-acidifiction-decline-of-great-barrierreef-likely-to-be-worse-than-feared
Energy (Carbon) (CO 2) Global Warming (Carbon) Economy (Jobs) https: //www. co 2. earth/ (CO 2)
EARTH DAY April 21, 1970 https: //www. nytimes. com/2020/04/21/climate/NYT-first-earth-day. html
EARTH DAY April 21, 1970 https: //www. youtube. com/watch? v=Bq. A 1 i. XYFRIU&feature=emb_title
EARTH DAY April 21, 2020 10 positive changes 10 negative changes https: //www. nytimes. com/interactive/2020/climate/earth-dayhistory. html? action=click&module=Top%20 Stories&pgtype=Homepage
CLIMATE CHANGE April 21, 2020 https: //www. nytimes. com/interactive/2020/04/19/climate-crash-course-2. html
https: //www. montereybayaquarium. org/stories/celebrate-earthweek/? utm_source=wordfly&utm_medium=email&utm_campaign=General. Earth. Week&utm_content=version_A&plankton=0
http: //chemconnections. org/general/chem 108/Global%20 warming%20&%20 Carb on%20 Footprint. 2020. pdf Bonus Due 20 -May
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