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Understanding Ground Level Air Pollution: Health Impacts and

School
Western University**We aren't endorsed by this school
Course
CHEM 2210A
Subject
Chemistry
Date
Dec 12, 2024
Pages
7
Uploaded by BailiffGazelle3840
September 27th, 2024CHEM 2210: Lecture 9THEME 2: GROUND LEVEL AIR POLLUTIONLook into government report: stateofglobalair.orgCanada’s air pollutant emissions inventory reportSince 2021, air pollution is in second place for global risk factors for death- it is immediately related to risk for human health.Air at ground level:-There are many source of air pollutants (e.g. natural, household, industry, automobile)-Air pollutants contain different types of species, and they have many health implications-Earth’s atmosphere is oxidizing; are gases are eventually fully oxidizedOxidation states:Application:-Predict the chemical property (eg. reactivity, stability) of a compound - Predict the reaction product in a re-dox reaction
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Losing of electrons is OXIDIZATIONNH3 for example- H is usually +1, 3(+1)= +3, which means N is -3, because NH3 is neutral.Reduced species don’t stay in this form very long, they eventually turn into their partially oxidized form.
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The most abundant storage of these elements are stored in their fully oxidized formCarbon in its fully oxidized form is CO2- cannot lose any more electrons at this point, can also beCO3^2- (not in the form of gas, in the form of a mineral solid)Highest oxygen state for Carbon: 4+, Nitrogen: 5+, Sulfur: 6+
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Ground levelozone isresponsible for theformation of thehydroxyl radical-but UV light isrequired for itsproduction.Two conditions,therefore:1)Ozone ispresent2)UV light ispresent
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What is the source of ground-level ozone?During daytime, if there is NO2, there will be ozone
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To understand increase in ozone concentration, we need to look at sources of NO2- production, factories, etc.
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The oxidizing power of the hydroxyl radical:
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