5 Questions
What is the potential difference between the two single electrode potentials a measure of?
EMF of the cell (Ecell)
What is used as a reference electrode in the measurement of the potential of the metal electrode?
Saturated calomel electrode (SCE)
What is the potential of the saturated calomel electrode (SCE)?
0.244 V
What does the potential difference between electrodes in contact with electrolyte containing the same cation measure?
EMF of the cell (Ecell)
What happens to the substance that loses electrons in an electrochemical cell?
It is oxidized
Study Notes
Electrode Potentials
- The potential difference between two single electrode potentials measures the electromotive force (EMF) of a cell.
Measuring Electrode Potential
- A reference electrode, typically a saturated calomel electrode (SCE), is used to measure the potential of a metal electrode.
Saturated Calomel Electrode (SCE)
- The saturated calomel electrode (SCE) has a potential of 0.244 V at 25°C.
Electrochemical Cell
- The potential difference between electrodes in contact with an electrolyte containing the same cation measures the potential of the electrode reaction.
Redox Reaction
- The substance that loses electrons (oxidized) in an electrochemical cell is reduced at the cathode.
Test your knowledge of measuring electromotive force in electrochemical cells with this quiz. Explore topics such as potentiometers, single cell-electrodes, and the potential difference between electrodes.
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