Basic Analytical Chemistry: Acid-Base Concepts and the pH Scale

February 2010

Abstract
Acids and bases are chemical compounds always present in our daily life. They are important raw materials in manufacturing industries and are necessary for the control of various industrial processes. They participate actively in living organisms’ metabolism and, if improperly disposable they can alter the environmental conditions necessary to the human well-being. Acids have sour [...]


Basic Analytical Chemistry: Applications of the Fundamentals of Qualitative Analysis

November 2009

Abstract
The Chemical and physical phenomena and the principles applied in qualitative analysis to identify ions in aqueous solution are the same ones used in quantitative analysis of different samples and are still used in many official reference methods, including instrumental methods or procedures. This shows the importance of knowledge of the fundamentals of qualitative analysis, [...]


Basic Analytical Chemistry: Ionic Equilibrium in Aqueous Solution

September 2009

Abstract
Obeying the fundamental law of nature that says, “a physical or chemical system always tends to cause an irreversible change from some state of initial non-equilibrium to a final equilibrium”, chemical reactions can be defined as processes in which different substances interact with each other, with a rearrangement of atoms occurring that completely changes the [...]


Basic Analytical Chemistry: The role of Analytical Chemistry in the Formation of Classical Chemist

September 2009

Abstract
The content of Inorganic Qualitative Analytical Chemistry usually used by Brazilian Higher Education Institutions (HEIs) covers the theory of chemical equilibrium in aqueous solution and, in the laboratory, the separation and identification of cations and anions in solution or solid samples, using classical methods. As there are still opinions both fory and against the maintenance [...]


Basic Analytical Chemistry: A Historical Overview of Classical Qualitative Analysis

Abstract
History shows that nothing is totally new and therefore the old should not be discarded, but known so that new knowledge can be constructed. Thus, when interviewed by Rudy M. Baum, Henry Taube, Nobel Prize in Chemistry in 1983, said that the disappearance of qualitative analysis from the curriculum of American universities was a mistake, [...]






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