Electrochemistry
In order to make it easier to describe a given electrochemical cell, a special symbolic notation has been adopted. In this notation the cell we described above would be
There are several other conventions relating to cell notation and nomenclature that you are expected to know:
- Transport Of Charge Within The Cell
For the cell to operate, not only must there be an external electrical circuit between the two electrodes, but the two electrolytes (the solutions) must be in contact. The need for this can be understood by considering what would...
- Galvanic Cells
This arrangement is called a Galvanic cell. A typical cell might consist of two pieces of metal, one zinc and the other copper, each immersed each in a solution containing a dissolved salt of the corresponding metal. The two...
- How To Balance Ionic Equations In Alkaline Medium?
(I) Standard Electrode Potential What information can we obtain from SEP? Sign – oxidation or reduction favoured Magnitude – the extent the reaction is favoured How to measure SEP? - connecting the redox couple (half cell) to SHE. - learn to draw...
- Electrochemistry : 10.1 Galvanic Cell (continued)
SPONTANEOUS REACTION occurs as the result of different ability of metal to give up their electron to flow through the circuit. CELL POTENTIAL (ECell) different in electrical potential of electrodes also called voltage or electromotive...
- Electrochemistry : 10.1 Galvanic Cell
Electrochemistry Study of relationship between chemical change & electric work Oxidation Loss of electron by species accompanied byn an increase in oxidation number Ex: Reduction Gain electron by a species accompanied by a decrease number...
Electrochemistry
Cell description conventions
In order to make it easier to describe a given electrochemical cell, a special symbolic notation has been adopted. In this notation the cell we described above would be
Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s)
- The anode is where oxidation occurs, and the cathode is the site of reduction. In an actual cell, the identity of the electrodes depends on the direction in which the net cell reaction is occurring.
- If electrons flow from the left electrode to the right electrode (as depicted in the above cell notation) when the cell operates in its spontaneous direction, the potential of the right electrode will be higher than that of the left, and the cell potential will be positive.
- "Conventional current flow" is from positive to negative, which is opposite to the direction of the electron flow. This means that if the electrons are flowing from the left electrode to the right, a galvanometer placed in the external circuit would indicate a current flow from right to left.
- Transport Of Charge Within The Cell
For the cell to operate, not only must there be an external electrical circuit between the two electrodes, but the two electrolytes (the solutions) must be in contact. The need for this can be understood by considering what would...
- Galvanic Cells
This arrangement is called a Galvanic cell. A typical cell might consist of two pieces of metal, one zinc and the other copper, each immersed each in a solution containing a dissolved salt of the corresponding metal. The two...
- How To Balance Ionic Equations In Alkaline Medium?
(I) Standard Electrode Potential What information can we obtain from SEP? Sign – oxidation or reduction favoured Magnitude – the extent the reaction is favoured How to measure SEP? - connecting the redox couple (half cell) to SHE. - learn to draw...
- Electrochemistry : 10.1 Galvanic Cell (continued)
SPONTANEOUS REACTION occurs as the result of different ability of metal to give up their electron to flow through the circuit. CELL POTENTIAL (ECell) different in electrical potential of electrodes also called voltage or electromotive...
- Electrochemistry : 10.1 Galvanic Cell
Electrochemistry Study of relationship between chemical change & electric work Oxidation Loss of electron by species accompanied byn an increase in oxidation number Ex: Reduction Gain electron by a species accompanied by a decrease number...