Claude berthollet and joseph proust biography
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Claude Louis Berthollet
French chemist (–)
Claude Louis Berthollet (French pronunciation:[klodlwibɛʁtɔlɛ], 9 December – 6 November ) was a Savoyard-French chemist who became vice president of the French Senate in [1] He is known for his scientific contributions to the theory of chemical equilibria via the mechanism of reverse chemical reactions, and for his contribution to modern chemical nomenclature. On a practical basis, Berthollet was the first to demonstrate the bleaching action of chlorine gas, and was first to develop a solution of sodium hypochlorite as a modern bleaching agent.
Biography
[edit]Claude Louis Berthollet was born in Talloires, near Annecy, then part of the Duchy of Savoy, in
He started his studies at Chambéry and then in Turin where he graduated in medicine. Berthollet's great new developments in works regarding chemistry made him, in a short period of time, an active participant of the Academy of Science in
Berthollet, alon
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Joseph Louis Proust
(–) French chemist
Proust was born the son of an apothecary at Angers in northwest France. He studied in Paris and became chief apothecary at the Saltpêtrière Hospital. In he went to Madrid to become director of the Royal Laboratory under the patronage of Charles IV. After the invasion of Spain bygd Napoleon, the fall of his patron, and the destruction of his laboratory by the invading army, he returned to France in He lived in poverty for some years before being awarded a pension bygd Louis XVIII.
In Proust formulated his lag of definite proportions. He pointed out that copper carbonate must always be made from the same fixed proportions of copper, carbon, and oxygen. From this he generalized that all compounds contained elements in certain definite proportions. Proust's lag was not immediately accepted by all chemists; in particular, his proposal led to a long and famous controversy with Claude-Louis Berthollet who argued that elements could combine in a whole r
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Scientist of the Day - Claude-Louis Berthollet
Claude-Louis Berthollet, a French chemist, was born Dec. 9, Berthollet came from Annecy, in the Savoy region of France, a few miles south of Lake Geneva in Switzerland. He trained as a chemist and physician and came to Paris in , where he became an active member of the chemical revolution then brewing. He teamed up wth Antoine Lavoisier and two others to write a book defining a new chemical language, Méthode de nomenclature chimique (; second image). Surprisingly, or perhaps not, he defended the phlogiston theory for quite a while after Lavoisier had given it up, arguing that there were many chemical reactions that were better explained by the phlogiston theory than by Lavoisier’s theory of combustion (which was true). Meanwhile, Berthollet discovered the chemical makeup of ammonia, and learned how to use chlorine compounds for bleaching. Eventually, he did discard the phlogiston theory, although he never did accept another f