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A strong acid, such as hydrochloric acid, at concentration 1 mol dm −3 has a pH of 0, while a strong alkali like sodium hydroxide, at the same concentration, has a pH of 14. Since pH is a logarithmic scale, a difference of one in pH is equivalent to a tenfold difference in hydrogen ion concentration.
Example Bjerrum plot: Change in carbonate system of seawater from ocean acidification.. A Bjerrum plot (named after Niels Bjerrum), sometimes also known as a Sillén diagram (after Lars Gunnar Sillén), or a Hägg diagram (after Gunnar Hägg) [1] is a graph of the concentrations of the different species of a polyprotic acid in a solution, as a function of pH, [2] when the solution is at ...
The McAuliffe-Shepard Discovery Center is a science museum located in Concord, New Hampshire, United States, next door to the NHTI campus. The museum is dedicated to Christa McAuliffe, the Concord High School social studies teacher selected by NASA out of over 11,000 applicants to be the first teacher in space, and Alan Shepard, the Derry, New Hampshire, native and Navy test pilot who became ...
The Henderson–Hasselbalch equation can be used to model these equilibria. It is important to maintain this pH of 7.4 to ensure enzymes are able to work optimally. [10] Life threatening Acidosis (a low blood pH resulting in nausea, headaches, and even coma, and convulsions) is due to a lack of functioning of enzymes at a low pH. [10]
Entrance to the Science Museum of Virginia. A science museum is a museum devoted primarily to science.Older science museums tended to concentrate on static displays of objects related to natural history, paleontology, geology, industry and industrial machinery, etc. Modern trends in museology have broadened the range of subject matter and introduced many interactive exhibits.
Model organisms are made standard by limiting genetic variance, creating, hopefully, this broad applicability to other organisms. [1] The idea of the model organism first took root in the middle of the 19th century with the work of men like Charles Darwin and Gregor Mendel and their respective work on natural selection and the genetics of ...
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The idea of creating "a library of reference and a chemical museum" in the United States can be found in the Proceedings of the first meeting of the American Chemical Society (ACS) in 1876. [7] The idea of a Science History Institute dates to 1976, when the nation's bicentennial and the ACS' centennial stimulated interest in history and ...