## Reference EMF Solution

STEP 0: Pre-Calculation Summary
Formula Used
Reference EMF = Indicator EMF+Junction EMF-Cell Potential in Potentiometry
Er = Ei+Ej-Ecell
This formula uses 4 Variables
Variables Used
Reference EMF - Reference EMF is the maximum Potential difference between two Electrodes of a cell.
Indicator EMF - Indicator EMF is the maximum Potential difference between two Electrodes of a cell. It is defined as the net voltage between the oxidation and reduction half-reactions.
Junction EMF - Junction EMF the maximum Potential difference between two Electrodes . It is defined as the net voltage between the oxidation and reduction half-reactions.
Cell Potential in Potentiometry - Cell Potential in Potentiometry is the amount of work energy needed to move a unit of electric charge from a reference point to a specific point in an electric field.
STEP 1: Convert Input(s) to Base Unit
Indicator EMF: 5 --> No Conversion Required
Junction EMF: 10 --> No Conversion Required
Cell Potential in Potentiometry: 20 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Er = Ei+Ej-Ecell --> 5+10-20
Evaluating ... ...
Er = -5
STEP 3: Convert Result to Output's Unit
-5 --> No Conversion Required
-5 <-- Reference EMF
(Calculation completed in 00.004 seconds)
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## Credits

Created by Torsha_Paul
University of Calcutta (CU), Kolkata
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National University of Judicial Science (NUJS), Kolkata
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## < 25 Potentiometry and Voltametry Calculators

Number of Electron given CI
Number of electrons given CI = (Cathodic Current/(2.69*(10^8)*Area of Electrode*Concentration given CI*(Diffusion Constant^0.5)*(Sweep Rate^0.5)))^(2/3)
Maximum Diffusion Current
Maximum Diffusion Current = 708*Moles of Analyte*(Diffusion Constant^(1/2))*(Rate of Flow of Mercury^(2/3))*(Drop Time^(1/6))*Concentration at given time
Area of Electrode
Area of Electrode = (Cathodic Current/(2.69*(10^8)*Number of electrons given CI*Concentration given CI*(Diffusion Constant^0.5)*(Sweep Rate^0.5)))^(2/3)
Concentration given CI
Concentration given CI = Cathodic Current/(2.69*(10^8)*(Number of electrons given CI^1.5)*Area of Electrode*(Diffusion Constant^0.5)*(Sweep Rate^0.5))
Cathodic Current
Cathodic Current = 2.69*(10^8)*(Number of electrons given CI^1.5)*Area of Electrode*Concentration given CI*(Diffusion Constant^0.5)*(Sweep Rate^0.5)
Diffusion Constant given Current
Diffusion Constant = (Cathodic Current/(2.69*(10^8)*Number of electrons given CI*Concentration given CI*(Sweep Rate^0.5)*Area of Electrode))^(4/3)
Sweep Rate
Sweep Rate = (Cathodic Current/(2.69*(10^8)*Number of electrons given CI*Concentration given CI*(Diffusion Constant^0.5)*Area of Electrode))^(4/3)
Current in Potentiometry
Current in Potentiometry = (Cell Potential in Potentiometry-Applied Potential in Potentiometry)/Resistance in Potentiometry
Applied Potential
Applied Potential in Potentiometry = Cell Potential in Potentiometry+(Current in Potentiometry*Resistance in Potentiometry)
EMF at Cell Junction
Junction EMF = Cell Potential in Potentiometry-Indicator EMF+Reference EMF
Cell Potential
Cell Potential in Potentiometry = Indicator EMF-Reference EMF+Junction EMF
Indicator EMF
Indicator EMF = Reference EMF-Junction EMF+Cell Potential in Potentiometry
Reference EMF
Reference EMF = Indicator EMF+Junction EMF-Cell Potential in Potentiometry
Number of Moles of Electron
Moles of Electron = Charge given Moles/(Moles of Analyte*[Faraday])
Moles of Analyte
Moles of Analyte = Charge given Moles/(Moles of Electron*[Faraday])
Charge given Moles
Charge given Moles = Moles of Electron*Moles of Analyte*[Faraday]
Potentiometric Concentration
Concentration at given time = Potentiometric Current/Potentiometric Constant
Potentiometric Constant
Potentiometric Constant = Potentiometric Current/Concentration at given time
Potentiometric Current
Potentiometric Current = Potentiometric Constant*Concentration at given time
Moles of Electron given Potentials
Moles of Electron = 57/(Anodic Potential-Cathodic Potential)
Cathodic Potential
Cathodic Potential = Anodic Potential-(57/Moles of Electron)
Anodic Potential
Anodic Potential = Cathodic Potential+(57/Moles of Electron)
Cathodic Potential given half potential
Cathodic Potential = (Half Potential/0.5)-Anodic Potential
Anodic Potential given half potential
Anodic Potential = (Half Potential/0.5)-Cathodic Potential
Half Potential
Half Potential = 0.5*(Anodic Potential+Cathodic Potential)

## Reference EMF Formula

Reference EMF = Indicator EMF+Junction EMF-Cell Potential in Potentiometry
Er = Ei+Ej-Ecell

## What is the basic principle of potentiometry?

The potential difference between the two electrodes used forms the basis of the potentiometry principle. The addition of a titrant leads to a change in the ionic concentration, causing changes in the potential difference. The indicator electrode measures this potential difference.

## How to Calculate Reference EMF?

Reference EMF calculator uses Reference EMF = Indicator EMF+Junction EMF-Cell Potential in Potentiometry to calculate the Reference EMF, The Reference EMF formula is defined as one of the important concepts that help us understand the process of electromagnetism. The electromotive force is abbreviated as the EMF and it is closely associated with the more common concept of voltage. The electromotive force is the total energy provided by a battery or a cell per coulomb q of charge crossing through it. Reference EMF is denoted by Er symbol.

How to calculate Reference EMF using this online calculator? To use this online calculator for Reference EMF, enter Indicator EMF (Ei), Junction EMF (Ej) & Cell Potential in Potentiometry (Ecell) and hit the calculate button. Here is how the Reference EMF calculation can be explained with given input values -> -5 = 5+10-20.

### FAQ

What is Reference EMF?
The Reference EMF formula is defined as one of the important concepts that help us understand the process of electromagnetism. The electromotive force is abbreviated as the EMF and it is closely associated with the more common concept of voltage. The electromotive force is the total energy provided by a battery or a cell per coulomb q of charge crossing through it and is represented as Er = Ei+Ej-Ecell or Reference EMF = Indicator EMF+Junction EMF-Cell Potential in Potentiometry. Indicator EMF is the maximum Potential difference between two Electrodes of a cell. It is defined as the net voltage between the oxidation and reduction half-reactions, Junction EMF the maximum Potential difference between two Electrodes . It is defined as the net voltage between the oxidation and reduction half-reactions & Cell Potential in Potentiometry is the amount of work energy needed to move a unit of electric charge from a reference point to a specific point in an electric field.
How to calculate Reference EMF?
The Reference EMF formula is defined as one of the important concepts that help us understand the process of electromagnetism. The electromotive force is abbreviated as the EMF and it is closely associated with the more common concept of voltage. The electromotive force is the total energy provided by a battery or a cell per coulomb q of charge crossing through it is calculated using Reference EMF = Indicator EMF+Junction EMF-Cell Potential in Potentiometry. To calculate Reference EMF, you need Indicator EMF (Ei), Junction EMF (Ej) & Cell Potential in Potentiometry (Ecell). With our tool, you need to enter the respective value for Indicator EMF, Junction EMF & Cell Potential in Potentiometry and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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