This equation allows you to derive the electrical charge which will be produced by a given concentration of electrolytes, or to calculate the electrical charge required to balance the concentration of elctrolytes across a cell membrane. Close this window
is used to calculate the equilibrium potential for a particular ion
the response of an electrode varies with respect to the logarithm of the activity of the measured ion. The Nernst equation is a mathematical description of the potentiometric sensor behavior. E = Eo+2.3RT/nF log A (where: E = Total potential, in mV, developed between the sensing and reference electrodes; Eo = The sum of the junction potentials in the electrode pair. This will vary with the choice of reference electrode; R = The gas constant 8.314 joules/deg/mol; T = The temperature of the solution in degrees Kelvin; n = The charge of the ion including sign; F = The Faraday constant, 96,500 coulombs; A = Activity of the ion measured).
the equation governing the electrochemical reading of pH.
A mathematical description of electrode behavior: E is the total potential, in millivolts, developed between the sensing and reference electrodes; Ex varies with the choice of electrodes, temperature, and pressure: 2.3RT/nF is the Nernst factor (R and F are constants, n is the charge on the ion, including sign, T is the temperature in degrees Kelvin), and ai is the activity of the ion to which the electrode is responding.
An equation that expresses the exact electromotive force of a cell in terms of the activities of products and reactants of the cell.
Corrects standard electrode potentials for nonstandard conditions.
The equation used to calculate the equilibrium potential for a permeant ion.
Mathematical expression that defines the electric potential across a membrane as directly proportional to the logarithm of the ratio of the ion concentrations on either side of the membrane and inversely proportional to the valency of the ions.
In electrochemistry, the Nernst equation gives the electrode potential (E), relative to the standard electrode potential, (E0), of the electrode couple or, equivalently, of the half cells of a battery. In physiology the Nernst equation is used for finding the electric potential of a cell membrane with respect to one type of ion.
