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What is the difference between diffusion potential and nernst potential?
Wiki User
ā 11y ago
The Diffusion Potential is the potential difference across the boundary b/w two electrolytic solutions of different compositions
The Nernst Potential is the diffusion potential across a membrane that exactly opposes the net diffusion of a particular ion through the membrane
Wiki User
ā 11y ago
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How to calculate hydrogen electrode?
By doing the Nernst equation
Nernst Distribution law?
"At constant temperature, a solute distributes itself between two immiscible solvents only in a particular ratio" Example:Carbon tetra chloride in water and iodine in benzene.
Can the Nernst equation be used at temperatures other than room temperature?
Yes. Why? The Nernst equation to calculate the Ecell for non standard conditions is as follows:Ecell = E°cell - (RT/nF ) lnQso T can be any temperature in KelvinThe other version of the Nernst equation is for standard conditions:Ecell = E°cell - (0.0592/n) logQThis applies only at room temperature. When at 25°C, (RT/F )becomes a constant of 0.0592. So if you are determining the Ecell at room temp use the second equation, for any other condition use the first equation.Cheers!
Why the temperature be constant n nernst distribution law?
Might be possible that the solubility may increase of the solute in the solvent and its concenteration may changes.
Explain the theory behind the potentiometric titration of acid base?
In potentiometric titration, the change in the concentration of H+ ions are monitored based on the emf measurement with respect to Saturated calomel electrode ( a reference electrode having a standard reduction potential of 0.2422 V). H+ ions concentration in terms of pH change is measured using primarily by quinhydrone electrode. Based on hydrogen electrode also it can be measured. An electrochemical cell consists of H+ ions (acid to be titrated) in contact with hydrogen gas (1 atm) or quinhydrone/ quinone should be formed and the emf (potential difference) of the cell is measured with reference to saturated calomel electrode (SCE). Then based on Nernst equation value of standard electrode potential of hydrogen ion is, EH = Eo + 0.0591 log [H+] or EH = - 0.0591 pH since Eo = 0 V and -log [H+] = pH So EMF of the cell is Ecell = ESCE - EH Ecell = 0.2422 - EH The Ecell value is plotted ( Y axis) against volume of base added (X axis). The volume corresponds to drastic Ecell change gives equivalence point of the titration. At equivalence point all the free H+ ions are replaced as H2O and this is reflected and can be inferred in the Ecell values.
What is nernst potential-?
The Nernst potential refers to the reversal potential of the membrane potential at which there is no net flow of a particular number of ion from one side of the membrane to another.
What is the difference between cell potential and standard cell potential?
the standard cell potential is the cell potential at standard conditions (25C , 1 atm , and 1M ) but the cell potential is the cell potential of the cell under a real condition and we use nernst equation . i hope this is useful
Is the Nernst potential of Sodium achieved during the action potential?
the Nernst potential of Sodium is +60mV. most action potentials do not reach +60mV at peak depoloarization. http://openwetware.org/images/thumb/a/a6/Action-potential.jpg/300px-Action-potential.jpg.png
The Nernst equation enables us to calculate the membrane voltage that exactly balances the diffusion of a particular ion down its concentration gradient To use the equation however you must know all?
equilibrium potential of the ion in millivolts (mV)
How do you pronounce Nernst as in Walther Hermann Nernst?
nernst
What is the name of the equation that governs cell potential for cells under nonstandard conditions?
Nernst Equation
What is the birth name of Bror Nernst?
Bror Nernst's birth name is Bror Otto Fredrik Nernst.
What is the physical significance of the Nernst-Einstein equation?
An equation relating the limiting molar conductivity Īm 0 (see Kohlrausch's law) to the ionic diffusion coefficients, devised by Nernst and Albert Einstein. The Nernst-Einstein equation is Īm 0=(F 2/RT)(v+ z+ 2 D++vā zā 2 Dā), where F is the Faraday constant, R is the gas constant, T is the thermodynamic temperature, v+ and vā are the number of cations and anions per formula unit of electrolyte, z+ and zā are the valences of the ions, and D+ and Dā are the diffusion coefficients of the ions. An application of the Nernst-Einstein equation is to calculate the ionic diffusion coefficients from experimental determinations of conductivity. Īm 0=(F 2/RT)(v+ z+ 2 D++vā zā 2 Dā)
What is Walther Nernst's birthday?
Walther Nernst was born on June 25, 1864.
When was Walther Nernst born?
Walther Nernst was born on June 25, 1864.
When did Bror Nernst die?
Bror Nernst died on June 2, 1927.
When did Walther Nernst die?
Walther Nernst died on November 18, 1941 at the age of 77.
