Sulfur Dioxide

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Sulfur Dioxide
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Properties

• formula SO2
• colourless gassoluble in water
• melting point -72.7 C
• boiling point -10 C

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Structure

• bent molecule
• sulfur atom has an oxidation station of 4

• bent - lomený

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Structure

• sulfur atom is surrounded by 5 electron pairs
  
• hypervalent
• molecule
• most of valence electrons are engaged in S-O
  bonding.

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Natural Sources

• oceans

• volcanoes

• forest fires

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Man made Sources

• fossil fuel combustion
• smelting
• manufacture of sulphuric acid
• conversion of wood pulp to paper

• combustion spalování
• wood pulp drevní bunicina

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Man made Sources

• production of elemental sulphur
• coal burning
• oil burning

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Production and Reaction

• S8 (l) 8 O2 (g) ? 8 SO2 (g)

Burning sulphur to give a blue flame

• constituent - základní

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Production and Reaction

• Cu (s) 2 H2SO4 (aq) ? CuSO4 (aq)
• SO2 (g) 2 H2O (l)

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Production and Reaction

• SO2 (g) ? SO2 (aq)
• SO2 (aq) H2O (l) ? H2SO3 (aq)

• demonstrate - ukázat
• container - nádoba

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Production and Reaction

• NaHSO3 (aq) H2SO4 (aq)
• ? NaHSO4 (aq) H2O (l) SO2 (g)

• drip - nakapat

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Uses

• As a preservative
• for dried apricots and other dried fruits
• to maintain their appearance
• to prevent their rotting

• apricot - merunka
• appearance - vzhled
• rotting - hnití

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Uses

• In winemaking
• as an antibiotic and antioxidant to protect wine
  from spoilage by bacteria and oxidation
• to keep volatile acidity
• in winery sanitation

• spoilage zkažení
• winery sanitation hygiena vinice

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Uses

• Biochemical and biomedical roles
• blocks nerve signals from the pulmonary stretch
  receptors
• abolishes the Hering-Breuer inflation reflex

• pulmonary plícní
• abolish - zrušit

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Health Impacts

• can affect the respiratory system, the functions
  of the lungs
• coughing, asthma and chronic
• bronchitis
  

• affect postihnout
• impact dopad
• prone - náchylný

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Environmental Impacts

• Acid rain
• damages trees, crops, historic buildings and
  monuments
• makes soils, lakes and streams acidic
• is a term used to describe all forms of acid
  precipitation (rain, snow, hail, fog, etc.)

• crop úroda
• hail - krupobití

• soil puda
• precipitation - srážka

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Environmental Impacts

• precipitation is naturally acidic because of
  carbon dioxide in the atmosphere. The burning of
  fossil fuels (coal, oil and gas) produces sulphur
  dioxide and nitrogen oxides which can increase
  the acidity of rain or other precipitation

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Environmental Impacts

• the increasing demand for electricity and the
  rise in the number of motor vehicles in recent
  decades has meant that emissions of acidifying
  pollutants have increased dramatically from human
  sources, particularly since the 1950s

• demand požadavek
• pollutant znecistující látka

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What We Should Do ???

• to reduce our dependence on fossil fuels and
  energy consumption
• not driving around, flying and having the heating
  or air conditioning turned up so high

• dependence - závislost
• consumption - spotreba

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What We Should Do ???
If were cold,
just wear more clothes
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What We Should Do ???

• dont be lazy and use your own energy to do
  things like cycling, walking and running

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What We Should Do ???

• find out more about renewable energy like solar
  power

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What We Should Do ???

• find out more about renewable energy like
  hydroelectric power

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What We Should Do ???

• find out more about renewable energy like wind
  power

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AND REMEMBER !!!

• How you choose to use energy affects all life on
  Earth so think before you act.

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Sources of Information

• http//en.wikipedia.org/wiki/Sulfur_dioxide
• http//www.epa.gov/air/urbanair/so2/
• http//so2.umbc.edu/omi/
• http//www.chm.bris.ac.uk/motm/so2/ so2h.htm
• http//mattson.creighton.edu/SO2/ SO2_Info.html

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• Thanks for your attention