2. Content page Introduction of Electrolysis Properties of sea water Compositions of sea water Electrode Electrolysis of sea water Chlorine gas Hydrogen gas Sodium hydroxide solution Conclusion

3. - A method of separating bonded elements and compounds by passing an electric current through them. - The most common form of electrolysis is the electrolysis of water Electrolysis

4. Properties of sea water Physical properties: - Water density - Sound speed - Temperature [ the most important ]* - Salinity [a liquid mixture of salt and pure water ] - Chlorophyll concentration - Particulate level Seawater is a mixture of various salts and water.

6. Electrode -The negatively charged one is the cathode -The positively charged one is the anode - Each electrode attracts ions which are of the opposite charge - At the probes, electrons are absorbed or released by the ions, forming a collection of the desired element or compound

7. electricity Sea water chlorine gas + hydrogen gas + sodium hydroxide solution -Pass electricity though the sea water -Chlorine gas is formed at the anode ( positive electrode) -Hydrogen gas is formed at the cathode (negative electrode) - In the end, the solution in the set-up becomes sodium hydroxide solution (sodium hydroxide is a compound made up of sodium, hydrogen and oxygen) The electrolysis of sea water

8. Chlorine Gas - It is a greenish yellow gas - It is a respiratory irritant - It irritates the mucous membranes and the liquid burns the skin - It was used as a war gas in 1915 - a powerful oxidizing, bleaching, and disinfecting agent

9. Hydrogen gas - It is a colourless and odourless gas - Since hydrogen is 14.5 times lighter than air, it was once widely used as a lifting agent in balloons and airships - It is an ingredient in rocket fuels

10. Sodium hydroxide solution (NaOH) - It is known also as lye or caustic soda - It is a caustic metallic base used in industry, mainly used in the manufacture of paper, textiles and detergents

11. Glossary anode: A positively charged electrode. cathode: A negatively charged electrode. compound: A pure substance composed of more than one element. covalent bond: A chemical bond that involves sharing of electron pairs. electrode: A solid electric conductor through which an electric current enters or leaves an electrolytic cell. electron: A negatively charged subatomic particle with a mass of 0.00055 atomic mass units (AMU). By definition, one AMU is one- twelfth the mass of a carbon-12 atom. ion: A charged particle. ionic bond: An electrostatic interaction between a cation (+ charged ion) and an anion (- charged ion).

12. Sources www.yahoo.com www.google.com http://en.wikipedia.org/wiki/Electrolysis http://www.cinms.nos.noaa.gov/pcw2/pcwprop.html http://www.bigelow.org/aquarius/electrolysis.html http://wikipedia.org/wiki/chlorine http://wikipedia.org/wiki/hydrogen http://en.wikipedia.org/wiki/Sodium_hydroxide