The voltage produced by this cell will be used to follow the change in silver ion concentration of the titration solution. In order to check the performance of the sensor we will follow its potential as the concentration of silver ion changes while we titrate a solution of silver nitrate with a solution of sodium chloride. Introduction A variety of electrochemical sensors are used for the measurement of pH, dissolved oxygen, concentrations of a variety of ions, and oxidation-reduction potentials.
Applications vary widely.
These include monitoring the neutralization of waste water containing sulfides, cyanides, chromates, nitrites, or organic waste and controlling the addition of oxidants such as ozone or chlorine to drinking water, swimming pools, or cooling towers. They are used to determine the concentrations of metal ions in solutions, natural waters, and waste waters and to determine the endpoint of titrations. Hospitals use them to monitor oxygen-rich atmospheres and divers use them to monitor the oxygen content of diving gases. Electrochemical sensors contain a reference electrode and a sensing electrode. The sensors produce a voltage that changes as the concentration of the sensed chemical species changes.