Sulfur Dioxide

Properties

formula SO2 colourless gassoluble in

water melting point -72.7 °C boiling point -10 °C

Structure

bent molecule sulfur atom has an

oxidation station of +4

bent - lomený

Structure

sulfur atom is surrounded by 5 electron pairs

hypervalent molecule most of valence electrons

are engaged in S-O bonding.

Natural Sources

oceans

volcanoes

forest fires

Man – made Sources

fossil fuel combustion

smelting manufacture of sulphuric

acid conversion of wood pulp to

paper combustion – spalování

wood pulp – dřevní buničina

Man – made Sources

production of elemental sulphur

coal burning oil burning

Production and Reaction

S8 (l) + 8 O2 (g) → 8 SO2 (g)

Burning sulphur to give a blue flame

constituent - základní

Production and Reaction

Cu (s) + 2 H2SO4 (aq) → CuSO4 (aq)

+ SO2 (g) + 2 H2O (l)

Production and Reaction

SO2 (g) → SO2 (aq)

SO2 (aq) + H2O (l) → H2SO3 (aq)

demonstrate - ukázat

container - nádoba

Production and Reaction

NaHSO3 (aq) + H2SO4 (aq)

→ NaHSO4 (aq) + H2O (l) + SO2 (g)

drip - nakapat

Uses

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

apricot - meruňka

appearance - vzhled

rotting - hnití

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

Uses

Biochemical and biomedical roles

blocks nerve signals from the pulmonary stretch receptors

abolishes the Hering-Breuer inflation reflex

pulmonary – plícní

abolish - zrušit

Health Impacts

can affect the respiratory system, the functions of the lungs

coughing, asthma and chronic

bronchitis

affect – postihnout

impact – dopad

prone - náchylný

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 – půda

precipitation - srážka

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

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 1950‘s

demand – požadavek

pollutant – znečisťující látka

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 - spotřeba

What We Should Do ???

If we’re cold, just wear more clothes

What We Should Do ???

don‘t be lazy and use your own energy to do things like cycling, walking and running

What We Should Do ???

find out more about renewable energy like solar power

What We Should Do ???

find out more about renewable energy like hydroelectric power

What We Should Do ???

find out more about renewable energy like wind power

AND REMEMBER !!!

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

act.

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

Thanks for your attention