Secondary Reference Electrode Consists Of The Following Chemical Formula. In electrochemical methods where it is necessary to observe measure or control the potential of another electrode denoted indicator test or working electrode it is necessary to use a reference elec. Principle of a polarographic clark type p o 2 sensor.
The impedance of a standard laboratory reference electrode is usually determined by the resistance of its isolation junction. The pertinent half reaction is ce agcl s e ag s cl textrm sat d with a value for e 0 of 0 222 v. Which of the following cannot be used as secondary reference electrode.
It is used as reference electrode in all potentiometer determinations and to measure ph of the given solution.
As a secondary reference electrode the ag agcl electrode is the most common due to its simplicity stability and capability of miniaturization. The active materials of the electrodes are deposited as coating on supporting lead. Nickel iron secondary cell 3. The actual potential of the half cell prepared in this way is 0 197 v vs she which arises because in addition to kcl agcl also contributes to the.
