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A Source Book in Chemistry, 1400–1900. Harvard University Press. ISBN 978-0-674-82230-6; Leicester, Henry Marshall (1968). Source book in chemistry: 1900–1950. Source books in the history of the sciences. Cambridge, Massachusetts: Harvard University Press. OCLC 438301. McKenzie, A. E. E. (1988).
The Henderson–Hasselbalch equation relates the pH of a solution containing a mixture of the two components to the acid dissociation constant, K a of the acid, and the concentrations of the species in solution. [6] Simulated titration of an acidified solution of a weak acid (pK a = 4.7) with alkali
analyte - anode - aqueous - balanced equation - Brönsted acid - Brönsted base - catalyst - cation - chemical change - chemical equation - combination reaction - combustion - complete ionic equation - compound - decomposition - single displacement - double displacement - electrolyte - endpoint - equivalence point - formation - indicator ...
John Knox was an early leader in the field of gas chromatography. As a PhD student in at Pembroke College, Cambridge, [3] in 1953 Knox, together with his fellow student Howard Purnell, constructed a self-designed gas chromatographer in their lab and used this to pioneer early research in the field.
The general expression Qualitative Analysis [...] refers to analyses in which substances are identified or classified on the basis of their chemical or physical properties, such as chemical reactivity, solubility, molecular weight, melting point, radioactivity properties (emission, absorption), mass spectra, nuclear half-life, etc. Quantitative Analysis refers to analyses in which the amount ...
Eric Johnson "Rick" Heller (born January 10, 1946) is the Abbott and James Lawrence Professor of Chemistry and Professor of Physics at Harvard University.Heller is known for his work on time-dependent quantum mechanics, and also for producing digital art based on the results of his numerical calculations.
The International Textbook Company (I.T.C.) was founded in 1895 by publisher Thomas J. Foster in Scranton, Pennsylvania. [1] I.T.C. published instructional papers, booklets, and textbooks for the International Correspondence Schools, a subsidiary department. The textbook company and the school were dependent on each other since their founding.
Semi-empirical calculations are much faster than their ab initio counterparts, mostly due to the use of the zero differential overlap approximation. Their results, however, can be very wrong if the molecule being computed is not similar enough to the molecules in the database used to parametrize the method.