To determine the concentration of chloride ions in a given solution using an ion-selective electrode ISE , you will need to perform a potentiometric titration. The following steps outline the procedure:1. Gather materials: You will need a chloride ion-selective electrode, a reference electrode e.g., Ag/AgCl , a pH/mV meter or ion meter, a magnetic stirrer, a beaker, and a standard solution of chloride ions e.g., 1000 ppm Cl- .2. Calibration: Prepare a series of standard solutions with known concentrations of chloride ions e.g., 0.1, 1, 10, and 100 ppm . Rinse the ISE and reference electrode with deionized water and immerse them in the first standard solution. Allow the electrodes to equilibrate and record the potential mV reading. Repeat this process for each standard solution, creating a calibration curve by plotting the mV readings against the log of the chloride ion concentrations.3. Sample preparation: Take an aliquot of the unknown solution and, if necessary, dilute it to fall within the range of the calibration curve. Ensure that the solution is at a similar temperature to the calibration standards.4. Measurement: Rinse the ISE and reference electrode with deionized water and immerse them in the unknown solution. Allow the electrodes to equilibrate and record the potential mV reading.5. Data analysis: Locate the mV reading of the unknown solution on the calibration curve and determine the corresponding log of the chloride ion concentration. Convert this value to the actual concentration by taking the antilog 10^x, where x is the log value .6. Calculation: If you diluted the unknown solution in step 3, multiply the determined concentration by the dilution factor to obtain the original concentration of chloride ions in the given solution.By following these steps, you can accurately determine the concentration of chloride ions in a given solution using an ion-selective electrode.