If the metal electrodes of a cell have close reduction potentials, the current produced will be small, whereas if the difference is significant, the magnitude of the current will be large. The standard reduction potential is established relative to the standard hydrogen electrode (SHE), defined as the potential of 0 V. The standard reduction potential E 0 E_0 E 0 is measured under standard conditions: 25 ☌, activity equal to 1 per ion, and pressure of 1 bar per gas involved in the reaction. The standard reduction potential E 0 E_0 E 0 of a material is a measure of its tendency to lose electrons. This tool allows calculating the potential of a cell with concentrations of the molecules.
#NERNST EQUATION CALCULATOR FULL#
You can use it to determine the potential E of half-cells or full cells. So we're talking about standard conditions here. Here we need to calculate the cell potential for a zinc-copper cell, where the concentration of zinc two plus ions and the concentration of copper two plus ions in solution is one molar, and we're at 25 degrees C. This is the equation that uses the Nernst equation calculator. Voiceover You can use the Nernst equation to calculate cell potentials. It also can be substituted by concentration. - Chemical activity of the molecule (atom, ion…) in the oxidized form.F F F - Faraday constant, equal to the number of coulombs per mole of electrons (96,485.3 C/mol).z z z - Number of moles of electrons transferred in the reaction (mol).T T T - Temperature at which the reaction would occur, measured in Kelvins (K).
R R R - Gas constant, equal to 8.314 J/(K⋅mol).E 0 E_0 E 0 - Standard reduction potential, also expressed in volts (V).E E E - Reduction potential, expressed in volts (V) Worked Example of K Calculation Write the Nernst Equation: E Eo -(0.0592/n)log10Q Write the Nernst Equation for the equilibrium expression: Calculate Eo.
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