CHEM 1A03 Lecture Notes - Lecture 7: Acid Rain, Sodium Bicarbonate, Sulfuric Acid
14 Jan 2017
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Unit 7 Acid- Base
Scenarios of acids and bases impact the environment
• Sulfur compound comes from the combustion sulfur containing fossil fuel in the
environment that dissolve in rain makes rain water naturally acid
• 2SO2(g) + O2(g)—2SO3(g)
• SO3(g)+H2O(l)--- H2SO4(aq)
• Acid rain: pH below 5
• Solution to mediate acid rain=add calcium carbonate, “liming”
• Certain plants that grow better in acidic environment
• in human body
• Buffer in our blood, resist the change in pH
Breath too slowly, conc. Of carbonic acid increase, decrease of pH in blood
Breath too fast, decrease conc of carbonic acid, increase pH of blood
ASA aspirin, acetylsalicydriz acid, overdose of aspirin, the body counteracts the effect by
increasing the rate of breath
Carbonic acid and sodium bicarbonate
CO2(g)+HxO(l)---H2SO3(aq)
Ocean Acidification
• About 30% of CO2 in the atmosphere from human activity, dissolves into ocean surface
waters and lowers the pH
• It affects the survival rate of certain microorganisms in the ocean
• CO2+H2O---H2SO3
• H2CO3+CaCO3---Ca(HCO3)2(s), deposit on ocean floor
• Decrease the concentration of the Ca+, which is necessary for the formation of the shell
of organisms such as oyster, mussels etc
• They are mostly at the bottom of the food chain, which eventually will affect us that at
the higher level of the food chain
Coral Bleaching
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Concentration has nothing to do with the strength of an acid or a base, the strength depends on
the percentage dissociation of the acid or base.
Strong acid has a hydrogen attached to either a oxygen atom or a halogen atom
Strong Acids and bases
NH4+
Ho4- weak acid
Strong and weak Acids place in CO32-
Co3 2- + H+ ---- Co2 (g)+ OH-
Strong acid will have more CO2 produced since it has a higher % dissociation
find more resources at oneclass.com
find more resources at oneclass.com
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CHEM 1A03 Full Course Notes
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Document Summary
Of carbonic acid increase, decrease of ph in blood. Breath too fast, decrease conc of carbonic acid, increase ph of blood. Asa aspirin, acetylsalicydriz acid, overdose of aspirin, the body counteracts the effect by increasing the rate of breath. Ocean acidification: about 30% of co2 in the atmosphere from human activity, dissolves into ocean surface waters and lowers the ph. Concentration has nothing to do with the strength of an acid or a base, the strength depends on the percentage dissociation of the acid or base. Strong acid has a hydrogen attached to either a oxygen atom or a halogen atom. Co3 2- + h+ ---- co2 (g)+ oh- Strong acid will have more co2 produced since it has a higher % dissociation. A hcl , arrhenius acid all acid. C nh3 cannot generate h- ions in water. Because by theory there is no such acid that is only a bronsted lowry acid but not the other two.
