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The value of 2.303 R / F is 1.9845 × 10 −4 V / K , so at T = 25 °C (298.15 K) the half-cell potential will change by only 0.05918 V / ν e if the concentration of a metal ion is increased or decreased by a factor of 10.
In mathematics, a Pisot–Vijayaraghavan number, also called simply a Pisot number or a PV number, is a real algebraic integer greater than 1, all of whose Galois conjugates are less than 1 in absolute value. These numbers were discovered by Axel Thue in 1912 and rediscovered by G. H. Hardy in 1919 within the context of Diophantine approximation.
is the partial pressure of the hydrogen gas, in bar (1 bar = 10 5 Pa) R is the universal gas constant: 8.3144 J⋅K −1 ⋅mol −1 (rounded here to 4 decimal) T is the absolute temperature, in kelvin (at 25 °C: 298.15 K) F is the Faraday constant (the charge per mole of electrons), equal to 96,485.3 coulomb·mol −1
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]
In electrochemistry, the Nernst equation is a chemical thermodynamical relationship that permits the calculation of the reduction potential of a reaction (half-cell or full cell reaction) from the standard electrode potential, absolute temperature, the number of electrons involved in the redox reaction, and activities (often approximated by concentrations) of the chemical species undergoing ...
A graph of the common logarithm of numbers from 0.1 to 100 In mathematics , the common logarithm (aka "standard logarithm") is the logarithm with base 10. [ 1 ] It is also known as the decadic logarithm , the decimal logarithm and the Briggsian logarithm .
The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [ 2 ] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [ 3 ]
The Lasance approximation formula is K e /K 0 = 1/ ... 425.2 303.2 323.2 361.2 373.2 427.2 353.70 ... This hearsay value is posted in the 48th Edition of the Handbook ...
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