Our understanding of chemical reactions as acid-base interactions comes from the wide acceptance of the Lewis definition of acids and bases, which supplanted both the earlier Bronsted-Lowry concept and the first definition--the Arrhenius model. Arrhenius first defined acids as proton (H) producers in aqueous solution and bases as hydroxide (OH) producers. ... According to Lewis, acids are electron pair acceptors and bases are electron pair donors. ... Arrhenius model - Arrhenius proposed that acids are substances that produce protons, H+, in aqueous solution, whereas bases produce hydroxi...

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According to the royal society of science the concentration of CO2 has gone up by 90 parts per million (PPM) since the 1800's. ... According to SATYA an organization that focuses on issues such as environmentalism says that, "since 1945, half of the world's rainforests have been burned, bulldozed and mined to oblivion. ... The "greenhouse effect" was first explained by the Swedish Scientist Svante Arrhenius however the connection to the combustion of fossil fuels in new. ...

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According to professor Jonathan Baron, "It might be argued that we should have known about global warming since 1896, when Svante Arrhenius first proposed the idea and then provided estimates that agree fairly well with modern computer models," (140). ... According to the scientists, global warming is a big problem and requires very close attention to the patterns over many years. ... According to the article, "Global Warming: Feature Articles," NASA's satellite has measured the sun's radiation since 1978 and Sun's radiation fluctuates every 11-year cycle. ... Accordi...

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Arrhenius acids and bases make up a class of compounds, which include many of many of our most common compounds and laboratory reagents. ... According to the Henderson-Hasselbalch equation, pH = pKa + log [base/acid] If there are equal moles of weak acid and the base, NaOH at the half-equivalency point during this lab, then the pKa is equal to the solution's pH value. ... The weak acid, HA ionizes according to the equation: HA  H+ + A- The ionization will occur until equilibrium is established. ...

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The Nobel Prize in Chemistry, 2000: Conductive polymers Contents Prize motivation 1 Conductive polymers - a surprising discovery 1 What is electrical conductivity? 2 What makes a material conductive? 3 Conductive polymers - the story 4 Applications of conductive polymers 5 Synthesis and processing 6 Mechanism of polymer conductivity - role of doping 6 Molecular electron-transfer theory 11 Electroluminescent polymers - second-generation conductive polymers 13 From silicon physics to molecular electronics 14 References and further reading 15 Prize motivation The Royal Swedish A...

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