HYDROGENOXYGENWATER

Jarmila SvobodováMartina Tomková

Faculty of ChemistryUniversity of Technology Brno

2005

H2O-water

the medium of life the most important molecule in the world

The chemical composition of an organisms

70% water

30% chemicals

30%

70%

Chemicals are made by:

•15%proteins

•6% RNA

•4%ions

•2%phospholipids

•2%polysacharides

•1%DNA

Structurea water moleculethe bond is polarnegatively charged,

positively charged

hydrogen bond 0,27nm

covalent bond 0,10nm

bond-vazba(chemická)

charged-nabitý

Animation

reaction two molecules of water

molecules of water join together in a hydrogen-bonded lattice

an animation structure of water

lattice-mřížka

Elementselements in the organism

0

10

20

30

40

50

60

1 2 3 4 5 6 7

elements

per

cen

t re

lati

ve

ab

un

dan

ce

H C O N Ca Na P

The relative abundance of elements in all living organisms

And one of the most important elements is…….

abundance-množství

OXYGEN

vigorous - silný

a non-metallic, biogenic element atomic number 8 of periodic table a vigorous oxidizing agent colourless, diatomic (O2) second most common element in the Earth System by weight component of water photosynthesis

OXYGEN

1774 Joseph Priestley (13.3.1733 - 6.2.1804)

discoverer of oxygen

OZONE O3

bleaching – bělení,bělící

layer - vrstva

active oxygen colourless gas in armosphere oxidation properties – water disinfection,

bleaching substances ozone layer x

UV light

PHOTOSYNTHESIS6H2O + 6CO2 C6H12O6+ 6O2

six molecules of water plus six molecules of carbon dioxide produce one molecule of sugar plus six molecules of oxygen

sunlight energy chemical energy

URL

http://www.woodrow.org/teachers/chemistry/institutes/1992/Priestley.html

http://www.jergym.hiedu.cz/%7Ecanovm/objevite/objev/pris.htm

http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html

http://en.wikipedia.org/wiki/Ozone_layer