On this day in Chemistry HistoryOn this day in Chemistry Historyhttp://www.rsc.org/learn-chemistry/collections/chemistry-calendar/may-13#otdic_13th May, 2013.American chemist John Bailarwas born on this day in 1904.He discovered that isomers couldexist in inorganic compounds. Bailarbecame recognised as the “father ofAmerican coordination chemistry”.Isomers?Compounds with the same chemicalcomposition but different structuralformulas,
Last Thursday (9thMay, 2013)…• It was announced that the concentration ofatmospheric carbon dioxide had breachedthe symbolically important level of400ppm.• For first time in 500M years.
Why is this important?• Link with global warming (climate change)ObjectivesIGCSE Chemistry (Core)• State that carbon dioxide and methane are greenhousegases and may contribute to climate change.• IGCSE Combined Science (Chemistry, Supplement)• Explain why the proportion of carbon dioxide in theatmosphere is increasing, and why this is important.
Composition of the Atmosphere90% of the mass of the atmosphere is in the lowest 16km(troposphere).This is the part we refer to as ‘air’
Effects on Plants and AnimalsWithin the next 70 years:• Habitats for a third (34%) of land animal specieshalved.• Habitats for half (57%) the World’s plant specieshalved.• Reptiles and amphibians at greatest risk.• Largest losses predicted from sub-SaharanAfrica, Central America, Amazonia andAustralia.Nature Climate Change, May 2013
Pests and Diseases• Higher temperatures suspected ofcontributing to spread of blue-tonguedisease in sheep and cattle in Britain.• Transmitted by midge, Culicoides imicola.