Search results
Results from the WOW.Com Content Network
Buffer capacity falls to 33% of the maximum value at pH = pK a ± 1, to 10% at pH = pK a ± 1.5 and to 1% at pH = pK a ± 2. For this reason the most useful range is approximately pK a ± 1. When choosing a buffer for use at a specific pH, it should have a pK a value as close as possible to that pH. [2]
Acid-neutralizing capacity or ANC in short is a measure for the overall buffering capacity against acidification of a solution, e.g. surface water or soil water.. ANC is defined as the difference between cations of strong bases and anions of strong acids (see below), or dynamically as the amount of acid needed to change the pH value from the sample's value to a chosen different value. [1]
Revelle factor. The Revelle factor (buffer factor) is the ratio of instantaneous change in carbon dioxide (CO 2) to the change in total dissolved inorganic carbon (DIC), and is a measure of the resistance to atmospheric CO 2 being absorbed by the ocean surface layer. [1] The buffer factor is used to examine the distribution of CO 2 between the ...
MES is used as a buffering agent in biology and biochemistry. It has p Ka value of 6.15 at 20 °C. The pH (and p Ka at ionic strength I≠0) of the buffer solution changes with concentration and temperature, and this effect may be predicted using online calculators. [2] MES is highly soluble in water. The melting point is approx. 300 °C.
The Henderson–Hasselbalch equation relates the pH of a solution containing a mixture of the two components to the acid dissociation constant, Ka of the acid, and the concentrations of the species in solution. [2] Simulated titration of an acidified solution of a weak acid (pKa = 4.7) with alkali. To derive the equation a number of simplifying ...
Carbonic acid is a chemical compound with the chemical formula H 2 C O 3. The molecule rapidly converts to water and carbon dioxide in the presence of water. However, in the absence of water, it is quite stable at room temperature. [ 5 ][ 6 ] The interconversion of carbon dioxide and carbonic acid is related to the breathing cycle of animals ...
Alkalinity. Sea surface alkalinity (from the GLODAP climatology). Alkalinity (from Arabic: القلوية, romanized: al-qaly, lit. 'ashes of the saltwort ') [1] is the capacity of water to resist acidification. [2] It should not be confused with basicity, which is an absolute measurement on the pH scale.
Good's buffers (also Good buffers) are twenty buffering agents for biochemical and biological research selected and described by Norman Good and colleagues during 1966–1980. [1][2][3] Most of the buffers were new zwitterionic compounds prepared and tested by Good and coworkers for the first time, though some (MES, ADA, BES, Bicine) were known ...